Numb big toes can be caused by tight shoes, nerve compression, diabetes, or vitamin deficiency. See a doctor if it persists.
Common causes
- Tight shoes.
- Sitting with legs crossed.
- Nerve compression.
- Diabetic neuropathy.
- Vitamin B12 deficiency.
- Gout or bunions.
- Sciatica.
At home
Wear roomy shoes, move your feet and massage them.
See a doctor
If numbness continues, spreads or comes with weakness.
Emergency
Sudden numbness with confusion or speech trouble.
Nerve pathways involved
The big toe gets sensation from branches of the deep peroneal nerve (between the first and second toes) and the medial plantar nerve. Tight shoes, prolonged squatting or sitting cross-legged can compress them. Numbness can also arise from the lower back, where L5 nerve root compression (sciatica) affects the big toe.
- Diabetic neuropathy affects up to 50 percent of people with long-standing diabetes, usually starting in the toes.
- Vitamin B12 deficiency can cause numbness and tingling, and is more frequent in vegans, older adults and people on metformin or acid reducers.
- Gout, a form of arthritis, often hits the big toe joint, with pain and swelling rather than pure numbness.
- Cold exposure and Raynaud phenomenon cause temporary numbness.
What to do
Wear shoes with a wide toe box, change positions often and try gentle stretching. Check blood glucose and B12 if numbness is persistent. Foot numbness with weakness, loss of bladder or bowel control, or sudden onset on one side of the body can signal a stroke or a spinal emergency and needs immediate care.
Nerve causes
Numb big toes can come from pinched nerves in the lower back, tight shoes, diabetes, vitamin B12 deficiency, gout, bunions or peripheral neuropathy. Diabetes affects roughly 38 million Americans.
Action
Check footwear fit, test glucose and B12, and see a doctor if numbness spreads, affects balance or comes with weakness. Sudden numbness with confusion or face droop is a stroke emergency, call 911.
Causes by region
Numbness in the big toe can result from a pinched L5 nerve root in the spine, a Morton’s neuroma or tarsal tunnel syndrome. Sesamoiditis and hallux rigidus affect toe joints. Tight shoes, high heels and long standing compress nerves. Gout often begins in the big toe with pain and swelling.
Testing and treatment
Doctors check reflexes, strength and sensation, and may order blood glucose, B12, nerve conduction studies or MRI of the spine. Treatments include shoe changes, orthotics, physical therapy and treating diabetes. Diabetes prevalence is about 11 percent of US adults, and foot checks are advised daily. Sudden numbness with weakness in a limb needs emergency evaluation.
Based on data from the American Academy of Orthopaedic Surgeons and the American Diabetes Association
