Bumps on the head that are painful to touch are considered to be related to traumatic collision, folliculitis, boils, sebaceous cysts, seborrheic dermatitis, and so on. 1. Traumatic collision: A bump on the head caused by a blunt object or something else can lead to bumps on the head, which are painful and may be accompanied by bruises and blood oozing out. 2. Folliculitis or boils: High temperature, excessive sweating, skin abrasions, lack of attention to cleanliness, skin breakage after scratching, leading to pathogenic bacteria invade the hair follicles to form inflammation, folliculitis, or even boils, which can cause localized hard pouches on the head, accompanied by redness, swelling, and pain. 3. Sebaceous cysts: the opening of sebaceous glands is blocked, sebum and other secretions can not be discharged smoothly, and gather in the opening area, forming bumps, accompanied by pain. 4. Seborrheic dermatitis: related to excessive secretion of sebaceous glands, there is chronic inflammation of the skin, inflammatory factors will stimulate sebaceous glands to increase secretion, manifested as a lot of oil on the scalp, the formation of small bumps, which may be accompanied by hair loss phenomenon. There may also be other reasons, it is recommended that patients go to the hospital in a timely manner, a clear diagnosis, follow the doctor’s instructions standardized treatment.