Itchy body after exercise may be related to bad habits, but also may be the emergence of allergic dermatitis, urticaria and other diseases. 1. Bad habits, patients wearing tight clothing during exercise, long time without exercise, suddenly increase the amount of exercise may appear after exercise itchy body. 2. Allergic dermatitis, patients sweat more during exercise, the sweat stimulates the skin, inducing allergic dermatitis, resulting in allergic reactions to the skin, so there will be itchy symptoms after exercise. 3. Urticaria, the patient’s body blood circulation speed after exercise, resulting in vagus nerve excitation, endings release acetylcholine and sensitizing substances, causing urticaria, itchy body after exercise. If there are obvious symptoms of itchy body after exercise, you need to consult a doctor in time for examination and treatment.