Pimples that don’t hurt or itch on the body may be caused by acne, keratosis pilaris, and lichen planus. 1. Acne: commonly known as pimples, is a follicular sebaceous gland unit of a chronic inflammatory skin disease, prevalent in adolescents and young people, the most common parts of the face, neck, chest, shoulders and back, the main manifestations of pimples, pustules, papules, and in severe cases can appear nodules, cysts, abscesses and so on. It can lead to pimples on the body without pain or itching. 2. Perifollicular keratosis: a common and harmless follicular keratosis abnormal skin disease, mainly manifested as follicular keratotic papules, like goose bumps, rough to the touch, usually not accompanied by pain and itching and other symptoms, which can also lead to pimples on the body without pain or itching. 3. Glossy moss: a chronic inflammatory skin disease of unknown etiology, occurring in children and young people. It is mainly characterized by multiple, scattered and non-convergent glossy pimples. There are usually no self-conscious symptoms. It can also cause pimples on the body without pain or itching. There are many other causes of pimples without itching, which should be taken seriously, timely consultation, identification of the cause of the disease, and follow the medical advice for further treatment or therapy.