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Mallet toe and hammer toe

Hammertoe and mallet toe are foot conditions that cause a bend that is not usual in a toe or toes. Wearing shoes that don't fit well can cause hammertoe and mallet toe. Other causes are foot injury and certain illnesses, such as diabetes. Often the cause isn't known.

Meralgia paresthetica

Meralgia paresthetica is a condition that causes tingling, numbness and burning pain in the outer thigh. It's caused by compression of the nerve that provides feeling to the skin covering the thigh.

Metatarsalgia

Metatarsalgia (met-uh-tahr-SAL-juh) is a condition in which the ball of the foot becomes painful and irritated. Metatarsalgia results from activities that involve running and jumping.

Methicillin- resistant staphylococcus aureus infection

Methicillin-resistant Staphylococcus aureus (MRSA) infection is caused by a type of staph bacteria that's become resistant to many of the antibiotics used to treat ordinary staph infections.

Mixed connective tissue disease

Mixed connective tissue disease, also called MCTD, has symptoms of more than one rheumatic condition. These conditions include lupus, scleroderma and myositis. Many people who have mixed connective tissue disease also have inflammatory arthritis and Sjogren syndrome. Mixed connective tissue disease is not common.

Morton’s neuroma

Morton neuroma is a damaged, enlarged nerve that causes pain on the bottom of the forefoot, usually in the area behind the third and fourth toes. The pain is usually sharp or burning. There may be pain, tingling or numbness spreading into these toes.