Foot Drop (Peroneal Nerve) & Outer Thigh Numbness (Meralgia Paresthetica)
The peroneal nerve wraps around the outside of the knee and can be compressed by leg crossing, weight loss, casts or surgery, causing foot drop and numbness on the top of the foot. Meralgia paresthetica is compression of a sensory nerve at the front of the hip, producing burning and numbness on the outer thigh, often related to tight belts, pregnancy or weight change. Both often resolve with conservative care; persistent cases can be relieved with nerve decompression.
Symptoms
- Foot drop, tripping, slapping gait
- Numbness on the top of the foot or outer shin
- Burning or tingling on the outer thigh without weakness
How it is diagnosed
Examination, EMG/NCS, imaging to exclude spine causes.
Treatment options
Without surgery
Removing the source of pressure, ankle-foot orthosis, physical therapy, injections.
Surgical options Dr. Daggubati offers
Common questions
What is the most common cause of a peroneal nerve problem?
Pressure on the outside of the knee — habitual leg crossing, rapid weight loss, prolonged bed rest, a tight cast or brace, or a direct blow. It is also seen after knee surgery and in people who squat for long periods.
Foot drop — is it the nerve or my back?
Both can cause it. An L5 nerve-root problem in the spine and a peroneal nerve problem at the knee look similar, and EMG together with examination distinguishes them. Treating the wrong site is the commonest reason foot drop fails to improve.
Does meralgia paresthetica need surgery?
Rarely. Most cases settle with loosening belts and clothing, weight loss, and time; injections help persistent cases. Decompression is reserved for disabling symptoms that do not respond.
Not sure this is you?
Bring your imaging and your story. A single visit usually clarifies what is going on and which options are realistic. Request an appointment or call (301) 718-9611.