The increasing number of red dots on the body is considered to be due to prickly heat, early childhood emergency rash and contact dermatitis. 1. Prickly heat: usually occurs in hot and humid environments in summer, mainly due to the blockage of small sweat glands in the ducts, so it will cause the patient to appear on the skin, such as red dots and other symptoms, accompanied by tingling and itching. If you can’t improve the environment in time, it will lead to more and more red spots on the body. 2. Early childhood emergency rash: this is a rash disease in children under 2 years old, usually there will be high fever lasting 3~5 days, the temperature can reach 39 degrees above, the heat out of the rash, so there will be more and more red dots on the body of the symptom, the rash occurs in the neck first, and then spread all over the body. 3. Contact dermatitis: mainly due to the patient’s contact with external allergens or irritants caused by the skin will cause allergic or irritation reaction, thus causing red spots on the body, accompanied by itching. It can also cause more and more red spots on the body. There may be other reasons for the increasing number of red spots on the body, which need to be examined and treated in conjunction with the doctor, and not blindly using drugs to avoid adverse effects.