Special itching of the back after bathing every day is common in the dry season when the weather causes dehydration and itching symptoms in the body after bathing, and may also be caused by improper bathing methods, such as overheated water temperature and excessive force, which should usually be observed first. If the itching symptoms have been persistent, and when the itching is unbearable and painful, you can go to the hospital for differential diagnosis. A, physiological factors: 1, dry dehydration: the most common winter or relatively dry weather, the local skin exposed to the air after bathing will be easy to dehydration, dry, especially when the number of baths, easy to destroy the tissue structure of the skin, after bathing, such as itchy skin due to dryness, you can apply body lotion moisturizing; 2, sensitive skin: refers to the high reaction state of the skin to external stimuli performance, such as redness, itching, etc., such as to Water temperature, body wash allergies, etc. may cause itchy back. Second, improper bathing: 1, the water temperature is too hot: try not to use too hot water when bathing, it is best to use the water temperature close to the skin, the temperature is too high it is easy to stimulate the skin, the skin is prone to itching after cleaning; 2, bath products: bathing bath products used improperly, can lead to itchy skin, serious red bumps, should choose a mild or weakly acidic body wash, can not use strong alkaline soap. Avoid bringing stimulation to the back skin; 3, excessive force: the skin surface has a layer of keratin layer, many people will scrub the skin hard when bathing, which will lead to the loss of keratin layer and sebum, weakening the skin’s resistance, easy to make the skin locally inflamed, thus making the skin itchy. Third, pathological factors: 1, dry eczema: with a variety of factors such as reduced oil secretion on the skin surface, often manifested as dry skin, cracking with flaking, can also have itching symptoms, may be related to the loss of water on the skin surface, oil reduction and other factors; 2, cholinergic urticaria: a type of urticaria, manifested as intense itching of the skin, or the emergence of redness, the wind disease can subside within 30-60 minutes. Generally due to the rise in the deep body temperature, such as exercise, eating too hot and spicy food, hot baths, etc., may be induced.