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Morton neuroma is a nerve injury that commonly causes thickening and pain between the third and fourth toes, according to MedlinePlus. Other common causes of toe pain include ingrown toenails, blisters, corns, calluses and other injuries, according to MedicineNet.


Corns are a thickening on the skin between the toes and can be painful, according to MedicineNet. A common symptom is pain and tenderness near the area. Corns can be painful regardless of the size.


Pressure from ill-fitting shoes often causes bumps to develop on toes, according to Riverside Health System. A corn is a bump that develops on the top of a toe due to friction between the shoe and the toe.


A melanoma may cause a small amount of pain if it appears under the toenail. However, it may also have no symptoms at all. Melanomas under the toenail often appear as brown or black streaks, according to WebMD.


About.com explains that the second toe develops longer than the big toe from a condition called Morton's toe, which results from irregularities in the metatarsal bones in the feet. The metatarsal bones are the long bones in the ball of the foot. In those with Morton's t...


Pain in the left arm can be a sign of an impending heart attack, according to Mayo Clinic. A physical problem, such as tennis elbow, may also be the root cause of the pain.


According to WebMD, chronic muscle pain is likely caused by a condition known as myofascial pain syndrome, or MPS. Another possible cause is fibromyalgia, which is the most common musculoskeletal condition after osteoarthritis. MPS is usually somewhat localized to speci...