Thermie and friction therapy performed using a special instrument.

"Thermie" therapy is one of the folk remedies in Japan and is mainly done by rubbing the skin with special instruments. The therapy is believed to relieve several symptoms which include pain, common cold and ileus. We report here the first two cases of thermie dermatosis in the English published work. The first patient had suffered from poikiloderma-like eruptions for 30 years after the initiation of a thermie therapy. The eruptions were on both the upper back and the abdomen. The second patient presented with a hyperpigmented plaque on the right femoral region, and excoriated papules and a hyperpigmented plaque on the left lower leg. The patient had received thermie therapy for 3 years. The histopathology of the first case revealed features of cutaneous amyloidosis, and, of the second case, superficial dermatitis and hypermelanosis in the epidermal basal layer. A common cause of both cases was regarded as the thermie therapy. This report suggests the importance of getting a thorough history including folk remedies in patients presenting such pigmented lesions.