Every year, some of the itchy skin with red bumps due to the heat may be due to eczema, prickly heat, papular urticaria, etc. It is recommended that the patient according to the different causes and under the guidance of the doctor to apply medication, such as glycerine lotion, tacrolimus ointment, mometasone furoate cream and so on. 1. Eczema: Because of the hot weather, the patient’s skin may not be able to tolerate it, which may lead to eczema. It is recommended that the patient can use glycerite lotion, hydrocortisone butyrate cream, tacrolimus ointment and other medications to relieve the treatment under the guidance of the doctor. 2. Prickly heat: If the temperature is high or the humidity is high, it may cause the patient to sweat a lot, so that the sweat gland ducts are occluded, thus forming prickly heat. It is recommended that the patient can use mometasone furoate cream and prickly heat powder under the guidance of the doctor, and try to keep the skin clean and dry, and the indoor temperature is suitable. 3. Pemphigus urticaria: Since mosquito bites are more likely to occur in summer, it may also lead to pemphigus urticaria. It is recommended that patients can use topical glucocorticoid ointment, such as mometasone furoate and dieldieldield ointment under the guidance of a doctor, or use antipruritic agents, such as glycerine lotion and zinc oxide ointment, to relieve itching. There may be other reasons for the occurrence of the above situation, it is recommended to go to the hospital for consultation and treatment in a timely manner, and medication should be used in accordance with the doctor’s instructions.