An itchy shower may be due to dry eczema, cholinergic urticaria, contact dermatitis and other diseases. 1. Dry eczema: the occurrence of this disease is associated with excessive water loss in the surface layer of the skin, reduced oil secretion and poor perspiration, common risk factors are too many baths, excessive scrubbing, skin aging, sensitive nerve endings. The main manifestations are itching, dry skin, flaking, etc., so the patient will appear to be itchy when bathing. 2. Cholinergic urticaria: because the patient in the bath will cause the skin local temperature rise, making cholinergic nerve impulses, followed by the release of acetylcholine, which will induce this disease, leading to patients with itching or burning sensation and other symptoms, and in severe cases, headache, nausea and other symptoms may occur. 3. Contact dermatitis: the disease is mainly refers to the occurrence of allergic inflammation, if the patient bath time to use the soap or cleaning maintenance supplies allergies, it is easy to induce contact dermatitis, followed by itching, erythema, edema, burning and other symptoms. Caused by a bath on the itching of more reasons, patients need to go to the hospital, clear specific causes, with the doctor active treatment.