Cholinergic urticaria (heat urticaria), which is mostly seen in young men, is mainly caused by heat stimulation such as exercise, heat, nervousness, eating hot drinks or alcoholic beverages. In patients with cholinergic urticaria, there is a pronounced pins and needles sensation and itching on the body and head when exposed to heat, and the skin all over the body may appear flushed and with small wind clusters. Some patients may also have only intense itching without wind masses. A few patients may have systemic symptoms such as nausea, vomiting, diarrhea, salivation, dizziness and headache. It is recommended to take oral antihistamines with local topical medications under the guidance of a doctor as a way to relieve the itching symptoms. In addition, a small number of patients with itchy body and head in the heat may be due to eczema, which has a complex etiology and can be triggered by hot and cold stimulation or consumption of spicy food, causing itchy skin. In daily life, we should pay attention to eliminating triggers, keep our bodies cool and happy, do not be in a hot environment for a long time, eat less spicy and stimulating food, do not wear chemical fiber clothing for a long time, pay attention to early to bed and early to rise, appropriate exercise to enhance physical fitness. If itchy skin occurs, do not scratch frequently to avoid infection.