Small bumps on the abdomen that don’t hurt or itch can be caused by folliculitis, sebaceous cysts, common warts and other diseases. 1. Folliculitis: Hair follicles are infected by bacteria or fungi and show an inflammatory reaction, manifested as pimples, which may not be uncomfortable; 2. Sebaceous cysts: Sebaceous cysts are caused by the blockage of the sebaceous gland opening of the hair follicle, and the main symptom of the patient is the appearance of cysts on the surface of the skin, which may be without pain and other discomforts. As a result, the patient will appear abdominal small bumps without pain and itchy phenomenon. 3. common warts: common warts is mainly due to the human papilloma virus, patients will have pimples, surface roughness and other symptoms. When the patient has the symptom of small abdominal pimples without pain or itching, he should go to the hospital in time to check the specific cause of the disease and be treated under the guidance of the doctor.