Erb’s Palsy Symptoms: Recognizing the Signs of a Birth Nerve Injury

When a newborn can’t move one arm normally after delivery, parents naturally worry. Erb’s palsy is a birth injury affecting the brachial plexus nerves in the shoulder, resulting in arm weakness or paralysis. Recognizing Erb’s palsy symptoms early allows families to begin treatment promptly and understand whether medical negligence during delivery may have caused the injury. If your baby shows limited arm movement, a limp arm, or difficulty using one hand, these could be signs of Erb’s palsy that warrant immediate medical evaluation.

If your newborn shows signs of Erb’s palsy—such as arm weakness, limited movement, or an inability to grip—you should seek medical attention right away. Early diagnosis and treatment can improve outcomes significantly. If a difficult delivery or excessive force during birth preceded these symptoms, medical malpractice may have occurred. Contact a birth injury attorney for a free case evaluation to understand your legal options, as statute of limitations deadlines apply.

On this page:

• Most common symptoms
• Arm and shoulder signs
• Hand and grip problems
• Facial involvement
• Symptoms by severity
• When symptoms appear
• How symptoms change over time
• When it’s medical malpractice
• Diagnosis and next steps
• Treatment options
• Finding legal help
• Frequently asked questions

Most Common Erb’s Palsy Symptoms in Newborns

The hallmark sign of Erb’s palsy in newborns is asymmetrical arm movement. While one arm moves freely, the affected arm hangs limply at the baby’s side or rests in an unusual position. Parents often notice this immediately after birth or within the first few days of life.

Newborns with Erb’s palsy typically cannot lift their affected arm away from their body. When you gently stimulate the Moro reflex (startle reflex), a healthy baby extends both arms outward. A baby with Erb’s palsy will only extend the unaffected arm, while the injured arm remains still or moves minimally.

The affected arm may appear turned inward toward the body, with the elbow straightened and the wrist flexed. This characteristic positioning results from paralysis of specific muscle groups controlled by the damaged brachial plexus nerves.

Many babies with Erb’s palsy symptoms also lack the grasp reflex in the affected hand, though this depends on which nerves sustained damage. The condition specifically impacts nerves C5 and C6, which control shoulder and elbow movement, while nerves controlling hand function may remain intact in some cases.

Arm and Shoulder Movement Problems

Shoulder weakness represents one of the most noticeable signs of Erb’s palsy. Affected infants cannot raise their arm at the shoulder joint. When lying on their back, the injured arm stays flat against the surface while the healthy arm moves freely.

The baby demonstrates no ability to bring the affected arm across the chest or reach toward the opposite side of the body. This limitation becomes particularly apparent during everyday activities like nursing or when the baby attempts to bring hands together.

Elbow flexion—bending the arm at the elbow—is typically severely limited or absent. While a healthy newborn can bend their elbow and bring their hand toward their face, a baby with Erb’s palsy cannot perform this movement on the affected side.

External rotation of the shoulder is lost, meaning the baby cannot turn the arm outward. The arm often remains in an internally rotated position, giving the appearance of being “stuck” close to the body.

If you notice your baby consistently favoring one arm while the other remains motionless, immediate pediatric evaluation is necessary. These symptoms may indicate a brachial plexus injury that requires prompt treatment.

Hand and Grip Symptoms

Hand function in Erb’s palsy varies depending on which nerves sustained injury. In classic Erb’s palsy affecting only the upper brachial plexus (C5-C6 nerves), hand and finger movement may remain normal even though shoulder and elbow function is impaired.

However, some babies show weakness in wrist extension, making the hand flop forward. The wrist appears flexed with fingers curled inward, though the baby may still demonstrate some finger movement.

Grip strength often differs between the two hands. You might notice your baby grasping your finger firmly with the unaffected hand but showing weak or absent grip on the injured side. This asymmetry becomes more obvious as the baby grows and begins reaching for objects.

When Erb’s palsy is more extensive—sometimes called extended Erb’s palsy—the injury affects additional nerves (C7), resulting in more significant hand involvement. These babies demonstrate weakness throughout the entire arm, from shoulder to fingertips.

Testing the palmar grasp reflex can help identify hand involvement. A healthcare provider places a finger in the baby’s palm; a healthy baby automatically grasps it. Reduced or absent response on one side suggests nerve damage.

Waiter’s Tip Position

Many infants with Erb’s palsy hold their affected arm in what medical professionals call the “waiter’s tip” position. The arm hangs straight down at the side with the elbow extended, the forearm turned inward (pronated), and the wrist flexed forward.

This distinctive posture resembles a waiter discreetly holding their hand behind their back while expecting a tip. The position results from paralysis of specific muscle groups while opposing muscles remain active, pulling the arm into this characteristic configuration.

The waiter’s tip position is particularly common when shoulder dystocia occurred during delivery. This birth complication happens when the baby’s shoulder becomes stuck behind the mother’s pubic bone, requiring maneuvers to complete delivery.

Parents often describe the affected arm as looking “dead” or “lifeless.” The baby shows no spontaneous movement and doesn’t react to touch or stimulation on that side the way they do on the healthy side.

This positioning becomes more noticeable as the baby grows. While newborns naturally keep their arms flexed close to their body, babies with Erb’s palsy maintain the extended, rotated position even during sleep or when startled.

Facial Involvement: When Erb’s Palsy Affects the Face

In rare cases, Erb’s palsy occurs alongside facial nerve injury, particularly when significant trauma occurs during delivery. Facial paralysis on the same side as the arm weakness may indicate more extensive nerve damage.

Signs of facial nerve involvement include drooping on one side of the face, an asymmetrical cry (the mouth pulls to one side), and difficulty closing the eye on the affected side. However, this represents a separate injury rather than a direct consequence of brachial plexus damage.

Horner’s syndrome occasionally accompanies severe brachial plexus injuries. This condition affects the nerves controlling the eye and includes symptoms like a smaller pupil, drooping eyelid, and decreased sweating on the affected side of the face.

When facial symptoms accompany arm weakness, the delivery likely involved substantial trauma. Medical records should be reviewed carefully to determine whether appropriate techniques were used and whether a cesarean section should have been performed instead of continuing with vaginal delivery.

The presence of multiple nerve injuries suggests significant force was applied during delivery. Families should consult with a birth injury lawyer to evaluate whether medical negligence during birth contributed to their child’s injuries.

Erb’s Palsy Symptoms by Severity Level

Medical professionals classify brachial plexus injuries into different severity levels based on the type and extent of nerve damage. Symptoms vary significantly depending on severity.

Neuropraxia represents the mildest form, involving nerve stretching without tearing. Babies with neuropraxia show weakness and reduced movement but typically recover within three to six months. The arm may move slightly, and reflexes might be present but diminished.

Neuroma occurs when damaged nerve tissue forms scar tissue during healing. Symptoms are more significant than neuropraxia, with substantial weakness and limited function. Recovery is partial and slower, often requiring several months to years.

Rupture involves a torn nerve that won’t heal on its own. Babies with nerve ruptures demonstrate complete paralysis in affected muscle groups. Without surgical intervention, these children typically won’t regain function in the injured arm.

Avulsion is the most severe injury, where the nerve tears away from the spinal cord. Complete paralysis of affected muscles occurs, and recovery is unlikely even with surgery. These cases often involve permanent disability requiring lifelong accommodation and assistance.

Initial symptoms may not reveal severity. Even babies with complete paralysis might show some involuntary muscle twitches that parents mistake for voluntary movement. Proper diagnostic testing determines injury severity.

When Erb’s Palsy Symptoms First Appear

Most Erb’s palsy symptoms are apparent immediately after birth or within the first 24 to 48 hours. Delivery room staff, pediatricians, or parents typically notice that the baby isn’t moving one arm normally.

In delivery rooms where shoulder dystocia occurred, medical staff usually watch specifically for signs of brachial plexus injury. They assess arm movement, check reflexes, and document any asymmetry before the baby leaves the hospital.

However, subtle cases might not be identified until parents notice developmental differences at home. By two to three months of age, healthy babies begin reaching for objects and bringing their hands together. A baby with Erb’s palsy won’t achieve these milestones with the affected arm.

Some parents first notice symptoms during routine activities. The baby may cry when the affected arm is moved or dressed, indicating discomfort. Alternatively, the arm might seem “floppy” or unresponsive compared to the other side.

Delayed recognition sometimes occurs when the injury is mild or when healthcare providers don’t adequately examine the baby after a difficult delivery. If you suspect arm weakness or limited movement at any point during your baby’s first months, request immediate evaluation regardless of whether concerns were raised in the hospital.

Early identification of Erb’s palsy symptoms allows treatment to begin sooner, which typically improves outcomes. Physical therapy started in the first few weeks of life can prevent joint stiffness and muscle contractures that complicate recovery.

How Symptoms Change Over Time

Without treatment, Erb’s palsy symptoms often worsen as the baby grows. The affected arm may not grow at the same rate as the healthy arm, resulting in noticeable size differences. Muscles that aren’t used properly can atrophy (shrink), making the injured arm appear thinner and shorter.

Joint contractures develop when the arm remains in one position for extended periods. The shoulder, elbow, and wrist can become stiff and difficult to move even passively. These contractures limit function and cause pain.

Babies who don’t receive appropriate physical therapy may develop compensatory movement patterns. They learn to accomplish tasks using only their healthy arm, which reinforces the asymmetry and reduces motivation to use the affected side.

With proper treatment, many babies show gradual improvement. Mild cases often resolve completely within three to six months, with the baby regaining full arm function. Parents notice increasing movement, improved strength, and better coordination as nerves heal.

Moderate to severe cases may show partial recovery. The child might regain some movement and function but continue experiencing weakness, limited range of motion, or coordination difficulties. These children benefit from ongoing occupational and physical therapy.

In cases requiring surgical intervention, improvement typically begins several months after the procedure as nerves regenerate. Recovery is slow—nerve tissue regenerates at approximately one inch per month—so progress occurs gradually over one to two years.

Regular monitoring of symptoms helps healthcare providers adjust treatment plans. Parents should document changes in movement, strength, and function, reporting any deterioration or unexpected symptoms to their child’s medical team.

When Erb’s Palsy Symptoms Indicate Medical Malpractice

While not all cases of Erb’s palsy result from medical negligence, certain circumstances suggest substandard care during delivery. Risk factors that should prompt careful delivery planning include a large baby (macrosomia), maternal diabetes, prolonged labor, and previous shoulder dystocia.

When healthcare providers fail to recognize these risk factors or don’t take appropriate precautions, they may be liable for resulting injuries. A planned cesarean section can prevent brachial plexus injuries in high-risk situations, but some physicians attempt vaginal delivery despite clear warning signs.

Excessive force during delivery represents another form of negligence. Pulling or twisting the baby’s head and neck to free a stuck shoulder can stretch or tear brachial plexus nerves. Proper shoulder dystocia management techniques minimize force while safely delivering the baby.

Improper use of delivery instruments like forceps or vacuum extractors can cause Erb’s palsy. These tools must be used carefully and only in appropriate circumstances. Applying too much traction or using instruments when contraindicated may constitute malpractice.

Documentation in medical records often reveals what happened during delivery. Notes indicating “difficulty with delivery,” “significant traction required,” or “shoulder dystocia with multiple maneuvers” suggest the baby experienced trauma that may have been prevented with different management decisions.

If your baby shows Erb’s palsy symptoms following a difficult delivery, you have the right to understand what occurred. Birth injury causes should be thoroughly investigated, and medical records should be reviewed by qualified experts who can determine whether negligence played a role.

Families affected by potential medical malpractice should speak with a birth injury attorney sooner rather than later. Statute of limitations laws impose strict deadlines for filing lawsuits, and waiting too long can eliminate your legal options regardless of the strength of your case.

Diagnosis and Medical Evaluation

When a baby demonstrates signs of Erb’s palsy, healthcare providers conduct a thorough physical examination. They assess muscle strength, range of motion, and reflexes in both arms, comparing the affected side to the healthy side.

The Moro reflex test is particularly useful for identifying brachial plexus injuries in newborns. The examiner gently allows the baby’s head to drop back slightly, triggering the startle reflex. Healthy babies extend both arms symmetrically, while those with Erb’s palsy show movement in only the unaffected arm.

Imaging studies help determine the extent of injury. X-rays may be ordered to rule out fractures, particularly clavicle fractures that sometimes accompany shoulder dystocia. These fractures can cause similar symptoms but have different treatment requirements.

MRI (magnetic resonance imaging) provides detailed images of nerve tissue and can identify the location and severity of brachial plexus damage. This information helps doctors predict recovery potential and determine whether surgery might be beneficial.

Electromyography (EMG) and nerve conduction studies measure electrical activity in muscles and nerves. These tests, typically performed when the baby is three to four weeks old, help determine which nerves are damaged and how severely.

Many cases are diagnosed based on physical examination alone, particularly when symptoms are obvious and the history includes shoulder dystocia or difficult delivery. Additional testing provides information needed for treatment planning rather than confirming the diagnosis.

Parents should ensure their baby receives evaluation by a specialist experienced in brachial plexus injuries. Pediatric neurologists, orthopedic surgeons, or specialized brachial plexus clinics offer the most comprehensive assessment and treatment planning.

Treatment Options for Erb’s Palsy Symptoms

Early physical therapy represents the foundation of Erb’s palsy treatment. Therapists teach parents gentle exercises and range-of-motion activities that prevent joint stiffness and encourage nerve recovery. These exercises should begin as soon as the diagnosis is made, often within the first few weeks of life.

Daily passive range-of-motion exercises move the baby’s arm through its full motion even though the baby cannot move it independently. This prevents contractures and maintains joint flexibility while nerves heal. Consistency is critical—exercises should be performed multiple times daily.

Occupational therapy becomes important as the baby grows. Therapists help children learn to use their affected arm during daily activities and play. They may recommend adaptive equipment or techniques that improve function and independence.

For babies who don’t show significant improvement within three to six months, surgical options may be considered. Nerve grafting repairs ruptured nerves by connecting healthy nerve segments to bridge the gap. Nerve transfers move a functioning nerve to restore critical muscle movement.

Muscle and tendon transfers may be performed in older children who have permanent weakness despite nerve repair. These procedures reposition functioning muscles to improve arm movement and positioning, enhancing the child’s ability to use the affected arm.

Botox injections sometimes help manage muscle imbalances. When some muscles work while opposing muscles are paralyzed, the functioning muscles can become overactive and cause positioning problems. Botox temporarily weakens these muscles, allowing better balance.

Treatment outcomes vary significantly. With prompt intervention, many babies with mild to moderate Erb’s palsy recover substantial or complete function. Severe cases may result in permanent limitations, but treatment can significantly improve quality of life and independence.

You can learn more about therapeutic approaches and surgical interventions at our comprehensive Erb’s palsy treatment page, which explains options in detail and discusses expected outcomes for different severity levels.

Long-Term Outlook When Symptoms Persist

Children with persistent Erb’s palsy symptoms face various challenges as they grow. The affected arm may be shorter and thinner than the healthy arm, creating visible differences that can affect self-esteem during childhood and adolescence.

Functional limitations impact daily activities. Tasks requiring two-handed coordination—such as tying shoes, cutting food, or playing certain sports—may be difficult or impossible without adaptation. Occupational therapy helps children develop compensatory strategies.

Educational accommodations may be necessary. Schools should be informed about the child’s limitations so appropriate support can be provided during physical education, handwriting activities, and other tasks requiring fine motor skills.

Despite these challenges, most children with Erb’s palsy lead full, active lives. They learn to adapt and often develop remarkable proficiency using their unaffected arm. Many participate in sports, pursue higher education, and have successful careers.

Ongoing medical follow-up is important. Children should be monitored for developing complications like bone growth abnormalities, joint problems, or chronic pain. Early intervention can prevent or minimize these issues.

Psychological support benefits many families. Coping with a child’s physical differences and limitations creates stress for both parents and children. Connecting with support groups and counseling services helps families navigate these challenges.

Finding a Birth Injury Lawyer

If medical negligence caused your child’s Erb’s palsy, you may be entitled to compensation for medical expenses, future care needs, pain and suffering, and other damages. Birth injury lawsuits can provide financial resources that help your child access the best possible treatment and support services.

When selecting a birth injury lawyer, look for attorneys with specific experience handling Erb’s palsy and brachial plexus injury cases. These cases require medical expertise and understanding of obstetric standards of care that general personal injury lawyers may lack.

Your attorney should have access to qualified medical experts who can review records and testify about whether negligence occurred. Proving medical malpractice requires demonstrating that healthcare providers deviated from accepted standards and that this deviation directly caused your child’s injury.

Most birth injury attorneys work on contingency, meaning they only receive payment if they recover compensation for your family. This arrangement allows families to pursue justice without upfront legal costs, making representation accessible regardless of financial circumstances.

Time limits apply to birth injury lawsuits. Each state has statute of limitations laws that impose deadlines for filing claims. Some states allow extensions for birth injuries discovered later, but waiting too long can permanently eliminate your legal options.

A free case evaluation allows you to understand whether you have a viable claim without financial obligation. During this consultation, attorneys review your child’s medical records and delivery circumstances, providing honest assessment of your legal options.

Taking legal action doesn’t change what happened during delivery, but it can secure resources that improve your child’s quality of life. Compensation from a birth injury lawsuit can fund specialized therapy, adaptive equipment, educational support, and future medical care that insurance may not cover.

Frequently Asked Questions About Erb’s Palsy Symptoms