Phantom Limb Pain

Phantom pain vs phantom sensation vs stump pain

The three often occur together, and residual limb pain can trigger phantom pain.

Why it happens

Several mechanisms combine:

• brain remapping: the area of the brain that represented the missing limb is "taken over" by neighboring areas, such as the face. This reorganization is linked to pain intensity
• spinal cord sensitization: nerve cells in the spinal cord become hyperexcitable after losing normal input
• cut nerve endings: like other nerve injuries, they can form neuromas, tangled bundles that fire abnormal signals
• memory of pre-amputation pain: people with severe pain before amputation are more likely to develop phantom pain
• psychological factors: stress, anxiety and depression don't cause phantom pain but can amplify it

Symptoms

• pain that seems to come from the missing hand, foot, fingers or toes
• burning, shooting, stabbing, crushing or cramping sensations
• a feeling that the missing limb is in an awkward, twisted or clenched position
• pain that comes and goes, lasting seconds to hours
• triggers: touching the stump, cold weather, stress, fatigue, urination, or changes in the prosthesis

It also occurs after removal of other body parts, such as a breast, eye or tooth.

Risk factors

• severe pain before amputation
• poorly controlled pain right after surgery
• stump problems: neuromas, poor fit, infection
• amputation of an upper limb (in some studies)
• psychological distress

Diagnosis

Phantom limb pain is diagnosed from your description. The doctor will also examine the residual limb to look for treatable causes of pain: infection, skin breakdown, bone spurs, neuromas, poor socket fit, or blood flow problems. Ultrasound or MRI can identify a neuroma.

Treatment

No single treatment works for everyone. Combining approaches is often most effective.

Medicines

• nerve pain medicines used for other kinds of neuropathic pain: gabapentin, pregabalin, amitriptyline or nortriptyline, duloxetine
• acetaminophen (paracetamol) and NSAIDs for mixed pain, following label doses
• opioids are sometimes used short-term after surgery but are not recommended long-term
• other options under specialist care, such as ketamine or calcitonin in some settings

Non-drug therapies

• mirror therapy: placing a mirror so the reflection of the intact limb appears where the missing limb was, then moving the intact limb. The brain "sees" the missing limb moving, which reduces pain for many people
• graded motor imagery: a stepwise program including recognizing left and right limbs, imagining movements, and mirror therapy
• virtual reality therapy, a newer approach based on the same principle
• TENS (transcutaneous electrical nerve stimulation)
• massage and desensitization of the stump
• physical therapy and early prosthesis use, which keeps the brain engaged with the limb
• psychological therapies, as used in chronic pain programs: CBT, relaxation and mindfulness reduce distress and pain impact

Procedures and surgery

• nerve blocks or injections around neuromas
• targeted muscle reinnervation (TMR) and regenerative peripheral nerve interface (RPNI): surgical techniques that redirect cut nerves into muscle, reducing neuroma and phantom pain, and increasingly done at the time of amputation
• spinal cord or peripheral nerve stimulation for severe, resistant pain

Prosthesis care

A well-fitting socket reduces stump pain and often phantom pain. Report rubbing, pressure points or changes in limb volume to your prosthetist.

Prevention

• good pain control before, during and after amputation, sometimes including nerve catheters or epidural analgesia
• TMR or RPNI performed at the time of amputation when appropriate
• early rehabilitation and prosthesis fitting

Outlook

Phantom pain is often most frequent and intense in the first 6 months and tends to lessen over time, though some people continue to have episodes for years. Most people find a combination of treatments that makes it manageable.

Frequently asked questions

What is phantom limb pain?

It is pain that feels as though it comes from a limb or body part that has been amputated. It is real pain caused by changes in the brain, spinal cord and cut nerves. It can feel burning, shooting, crushing or cramping.

Why does phantom limb pain happen?

After amputation, the brain's map of the body reorganizes, the spinal cord becomes sensitized, and cut nerve endings may form neuromas that send abnormal signals. Together, these make the brain perceive pain in the missing limb.

Does phantom limb pain go away?

It often becomes less frequent and less intense during the first year after amputation, and for some it fades completely. Others have ongoing episodes that can usually be managed with treatment.

What is the best treatment for phantom limb pain?

There is no single best treatment. Commonly used options include nerve pain medicines such as gabapentin, mirror therapy and graded motor imagery, TENS, a well-fitted prosthesis, psychological support, and nerve surgeries such as targeted muscle reinnervation.