Foot Drop: Causes & Why It Needs Prompt Care
Foot drop means difficulty lifting the front of the foot, which can make the foot catch or drag while walking. It is a sign of weakness in the muscles that lift the foot and is often caused by nerve compression — for example from a slip disc in the lower back. Because muscle weakness can become harder to reverse over time, foot drop deserves prompt evaluation.
Common causes
- Herniated (slip) disc
A disc compressing a lower-back nerve root (often L5) can weaken the muscles that lift the foot.
Learn about slip disc → - Spinal stenosis
Narrowing of the spinal canal can compress nerves and contribute to leg weakness.
Understand spinal stenosis → - Peripheral nerve compression
The peroneal nerve near the knee can be compressed, affecting foot lift.
Peripheral nerve surgery → - Other neurological causesFoot drop can sometimes relate to other neurological conditions, so a careful diagnosis is essential.
Red flags — see a neurosurgeon urgently
Seek urgent medical care if you have:
- • Sudden onset of foot drop
- • Rapidly worsening leg weakness
- • Foot drop with loss of bladder or bowel control
- • Numbness around the groin or inner thighs (saddle area)
- • Foot drop following a significant injury
New or progressing weakness from nerve compression can become permanent if left untreated. Earlier assessment offers the best chance of recovery.
Diagnosis & treatment
Assessment includes testing the strength of the muscles that lift the foot, examining sensation and reflexes, and often an MRI to find the site of nerve compression. Nerve conduction studies may help locate the problem. Treatment depends on the cause and duration:
Physiotherapy & bracing
Exercises and an ankle-foot orthosis can support walking and protect against falls.
Treating the cause
Where a disc or stenosis is responsible, addressing the underlying compression is central to recovery.
Decompression surgery
When nerve compression is confirmed, decompression or endoscopic spine surgery may relieve pressure on the nerve.
Noticed difficulty lifting your foot?
Frequently asked questions
What is foot drop?
Foot drop is difficulty lifting the front part of the foot, which can cause the foot to drag while walking or lead to a high-stepping gait. It is a sign of weakness in the muscles that lift the foot, usually caused by a problem affecting the nerves controlling them.
What causes foot drop?
Foot drop is often caused by compression of a nerve — for example a herniated (slip) disc or spinal stenosis pressing on a nerve root in the lower back, or compression of the peroneal nerve near the knee. It can also relate to other neurological conditions, so an accurate diagnosis is important.
Is foot drop an emergency?
New or rapidly worsening foot drop should be evaluated promptly because muscle weakness from nerve compression can become harder to reverse the longer it is left untreated. If foot drop appears suddenly or is accompanied by loss of bladder or bowel control, seek urgent care.
Can foot drop be treated?
Yes. Treatment depends on the cause and how long it has been present. Options range from physiotherapy and bracing to procedures that relieve nerve compression. Earlier evaluation generally gives the best chance of recovery, which is why timely assessment matters.
Medically reviewed by Dr. Sayuj KrishnanConsultant Neurosurgeon, Yashoda Hospital MalakpetLast reviewed 19 October 2025
This information is for educational purposes only and should not replace professional medical advice. Please consult with Dr. Sayuj for personalized medical guidance.
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