Causes of foot numbness include lack of blood flow to the foot and certain orthopedic conditions that cause damage to the nerves, according to Healthgrades. Nerve compressing or nerve damaging conditions including stroke, underactive thyroid, multiple sclerosis, diabetic neuropathy and peripheral neuropathy may also cause foot numbness.
Conditions that cause lack of blood flow to the foot resulting in numbness include arteriovenous malformation, peripheral artery disease or peripheral vascular disease, frostbite, Buerger’s disease and deep vein thrombosis, says Healthgrades. Orthopedic conditions that may result in foot numbness include herniated disk, nerve entrapment, osteoporosis, back injury and degenerative disk disease. Bone fractures may also injure the nerves, causing leg numbness.
Foot numbness is the loss of sensation in one or both feet, notes Healthgrades. Typically, paresthesias, which is a burning sensation, precedes foot numbness. The cause of foot numbness determines the duration of the condition. For instance, whereas chronic feet numbness may be due to nerve damage, a short-term numbness may result from prolonged sitting. Foot numbness may be accompanied with life-threatening symptoms such as paralysis, loss of consciousness, breathing difficulty and bladder loss. Patients should seek immediate medical attention if such symptoms appear so that the underlying cause can be diagnosed and treated.