Itchy body from time to time may be caused by emotional tension, dry skin and other physiological factors, may also be hives, eczema and other diseases. 1. Physiological factors: If the recent stress is too much, the emotion is in a state of tension for a long time, or the skin is too dry, will lead to itchy body from time to time. 2. Urticaria: body itchy from time to time may also be caused by urticaria, urticaria manifested as the size of the wind with itching, etiology and physical stimulation, food, drugs, plants and chronic infections, fatigue, stress and other factors. 3. Eczema: Eczema manifested as polymorphic rash, symmetrical distribution, accompanied by conscious itching. Its etiology is not yet clear, and it is related to the internal causes of the organism (such as endocrine diseases, nutritional disorders), external causes (allergens in the environment and food), as well as psychosocial factors. There are more reasons for itching from time to time (e.g. neurosis, pruritus, etc.), so it is recommended to consult a doctor for examination and clear diagnosis.