A lot of pimples on the body are considered to be caused by folliculitis, boils and acne. 1. Folliculitis: It is a common inflammatory skin disease of the hair follicles, which can appear in any hair follicle part of the body, such as the head, face, neck, thighs and armpits, etc. The main manifestation is the appearance of red pimples around the hair follicles. The main manifestation is the appearance of red papules around the hair follicles, which may appear pus, itching, pain and other uncomfortable symptoms. 2. Boil: It is one of the common surgical infections, which is mainly caused by Staphylococcus aureus infecting the hair follicles or the tissues around the hair follicles, resulting in acute suppurative lesions on the hair follicles. It usually occurs on the head, face, neck, back and buttocks, etc., which can lead to localized redness, swelling, heat and pain, small nodules and pus. 3. Acne: It is a common chronic inflammatory disease of the sebaceous glands of the hair follicles, which is mainly related to excessive secretion of androgens, propagation of Propionibacterium acnes and genetic factors. It can lead to pimples, nodules and cysts on the face, forehead, chest and shoulders. In addition, papular urticaria, syphilis and many other diseases can also lead to many pimples all over the body. Therefore, it is best to go to the hospital for timely consultation and treatment when you have a lot of pimples on your body.