Itchy chest may be caused by dry skin, excessive mental tension, rough underwear, in puberty or menstruation and other non-disease factors, generally after local moisturizing, calm mood, change comfortable underwear, with the end of menstruation or puberty symptoms will gradually ease. If the symptoms of discomfort are strong or even aggravated, it is considered to be caused by disease factors such as allergic dermatosis and should be promptly checked by a doctor. 1. allergic dermatosis: the itchy chest is mostly caused by the body’s allergic reaction after contact with allergens such as mites, smoke and dust, mostly manifested as eczema, contact dermatitis, etc. 2. fungal dermatosis: ringworm is the main cause of itchy chest. The symptoms are characterized by paroxysmal and intense itching at the lesion. 4. It is recommended to go to the hospital for relevant examination to confirm the diagnosis. In daily life should pay attention to their own hygiene, regular body skin cleaning and moisturizing, for the selection of underwear should try to choose comfortable, loose, breathable materials, and keep the mood soothing.