Category A - full version without watermark 720x576 (check terms and conditions at www.teledesign.de) The embed version with watermark is free of charge. - Description: Pain in the ball of the foot (called metatarsalgia) may have many different causes. Most often the pain is caused by nerve damage or by an abnormality of the joints nearest the balls of the feet (metatarsal joints). Often, developing one disorder that causes pain in the ball of the foot contributes to development of another disorder that causes pain in the same location. Hallux valgus, often referred to as "a bunion" is a deformity of the big toe. The toe tilts over towards the smaller toes and a bony lump appears on the inside of the foot. Sometimes a soft fluid swelling develops over the bony lump. The bony lump is the end of the "knuckle-bone" of the big toe (the first metatarsal bone) which becomes exposed as the toe tilts out of place.