If the body itches when it is hot, it may be heat urticaria or eczema, and the treatment should be chosen according to the different causes. 1. Heat urticaria: Patients can develop deep body temperature rise after heat, exercise, emotional stress, eating hot drinks or ethanolic beverages, manifesting as pruritic erythema, and wind clumps. Oral antihistamines, such as loratadine and levocetirizine, can be taken at the onset of the disease. At the same time, we should avoid triggering factors, such as moving to a ventilated and cool place, avoiding heat and stopping strenuous exercise, controlling emotions, etc.; 2. Eczema: the triggering factors are more complex, mainly caused by the external environment is too hot or emotional tension and excitement. First of all, we should avoid the triggers, stay away from the hot environment and calm down the excitement. Then you can choose oral antihistamines according to the doctor’s guidance, and local treatment can choose topical drugs, such as glucocorticoid cream. Patients with itchy skin should avoid scratching the affected area to prevent infection. In addition, it is important to ensure that the skin is clean, but do not use boiling water to scald the skin.