The red pimples on the body are itchy, which may be caused by skin allergy, such as eczema, urticaria, solar dermatitis, insect bite dermatitis, other skin allergic diseases, etc. At this time, be careful not to use drugs without authorization, or side effects may occur. First of all, the red pimples on the body are very itchy. It should be ruled out whether it is caused by the use of irritating cosmetics or mosquito bites. If there is persistent redness, you must go to the hospital for inspection and treatment in time. At ordinary times, ensure enough sleep, avoid contact with allergens, reduce skin irritation, drink more boiled water, exercise more, and eat regularly.