It is a rare granulomatous skin disorder which can effect shin of insulin dependant diabetics or sometimes non diabetics. Typically the yellow brown patches develop slowly on the lower leg over several months. It maybe asymptomatic and persist for years. A minor injury may cause it to ulcerate and be very painful. Not all cases require treatment. But some of them include topical steriods under tight dressing, intra lesional steriod injection or tablets .