A small meatball on the breast may be HPV (human papillomavirus) infection, but also may be Montgomery’s nodules, fat grains, skin flabs, and so on. 1. HPV infection: at this time may appear flat warts, mostly in the back of the hands, face, chest and neck distribution, the skin above the breast may also appear flat warts, usually not accompanied by pain and itching and other symptoms, laser removal can be. 2. Montgomery’s nodule: a physiological change unique to women during pregnancy, is the Montgomery’s gland ductal opening protruding formation, in the nipple around the performance of granular protrusion, after breastfeeding Montgomery’s nodule will gradually disappear. 3. Fat grain: The skin around the breast is not clean and cared for, so that the local skin pores are blocked to produce fat grain. 4. Skin superfluous organisms: the most common one is soft fibroid, which leads to the appearance of small flesh-like bumps around the breasts. Smaller soft fibroid tumors are temporarily observed without treatment, and can be laser or surgical excision if necessary. In short, the small meatballs on the breast may be caused by HPV infection, or other reasons, it is recommended to go to the hospital dermatology department, after diagnosis, follow the doctor’s instructions to deal with.