Barbules may be caused by physiological factors such as dry skin and lack of trace elements, or they may be related to diseases such as ichthyosis and eczema. 1. Physiological factors: If the skin is dry and lacks trace elements, local skin abnormalities may occur, such as the appearance of barbs, peeling and so on. 2. Ichthyosis: the cause of its formation is mostly related to heredity, disease and nutritional deficiencies, etc. Clinical manifestations of dry skin, ichthyosiform lesions and flaking, etc., and some patients will have barbs. 3. Eczema: the cause of its formation may be related to heredity, immune abnormalities and environmental factors, typical symptoms of erythema, skin roughness and hypertrophy and itching, some patients may have symptoms of barbs. There are many reasons for the occurrence of barbs, and after eliminating physiological factors, it is recommended that patients go to the dermatology department of a regular hospital to find out the cause of the problem.