汗泡疹是一種特別的濕疹，常在手掌或腳掌出現透明像球狀樣比芝麻更小的小水泡，輕者只發生於手指掌面角質層覆蓋的部分，重者整個手掌、腳掌、腳側面皆會發作，初發者不甚癢，長期發作嚴重者則出現嚴重搔癢，患者多忍不住搔抓，導致水泡破裂，且會有透明黏液流出，等乾燥後會有脫皮現象，如此反覆常導致局部角質層增生，患者痛苦不堪。中醫認為此乃局部濕氣滯留，濕久化熱，與水份代謝有關之臟腑機能衰退皆有關。

Dyshindrosis is a type of eczema, often shown as tiny clear globular blisters that are smaller than sesame in size on palms and soles. Patients with mild symptoms show blisters on stratum corneum on the palm side of the fingers; patients with severe symptoms show blisters all over palms, soles and sides of legs with less itchiness in the early stage; patients with severe symptoms show unbearable itchiness that induces patients to scratch and break the blisters with oozing and shedding of the skin. Patients often agonize over this repetitive pattern causing local proliferation of stratum. Chinese medicine considers eczema as stagnation of dampness and heat. It is also considered relating to the degeneration of viscera's in charge of water metabolism.