It is a very common cause of cholinergic urticaria. After meals, after strenuous exercise, when drinking alcoholic beverages or when you are emotionally agitated, you will stimulate the release of cholinergic energy in your body and a rash will appear with a local stinging sensation. A small number of patients with stinging itch on their bodies when they are hot are due to eczema attacks, which need to be treated accordingly according to the different causes. 1. Cholinergic urticaria: Get rid of the allergen as soon as possible and avoid aggravating the condition with emotional excitement. In addition, you can also take oral antihistamines under the guidance of a doctor, combined with local topical medications to stop the itching. Patients should usually pay attention to their surroundings, take protective measures if the ambient temperature is too high, avoid bathing with hot water, pay attention to regulating their emotions, avoid emotional excitement, avoid eating excessively hot and spicy stimulating food, and refrain from drinking drinks containing alcohol. If the triggering cause is hot water and exercise, you can choose desensitization therapy according to your personal situation and doctor’s advice; 2. Eczema: eczema has a complex etiology, often as a result of the interaction of internal and external factors, which may be induced by changes in environmental temperature. Patients should clarify the trigger, if it is due to hot weather and high room temperature, they should stay away from allergens and be in a cool and comfortable environment. Patients with severe itching may choose oral or topical medication, such as antihistamines, under the guidance of a physician. 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 wash the skin.