Small meatballs with pain in the armpit may be caused by soft fibroma, axillary lymphadenitis or infectious molluscum contagiosum, which need to be treated with laser, drugs (such as ibuprofen extended-release capsules) and clamping according to the cause. 1. Molluscum Contagiosum: It is also called skin flap, which is caused by long-term dampness of armpit or infection caused by sports abrasion. It can be removed by laser method or liquid nitrogen freezing, and it can be removed by electrocautery or carbolic acid cauterization treatment. 2. Axillary lymphadenitis: manifested as smooth, active lumps, when inflammation occurs there may be pain, can be treated with anti-inflammatory, anti-infection drugs, such as ibuprofen extended-release capsules, mupirocin ointment and so on. If necessary, oral antibiotics. 3. infectious molluscum contagiosum: mainly caused by viral infection, usually manifested as wax-like glossy papules and nodules on the skin, with a concave tip, which can be extruded into cheese-like molluscum contagiosum. You can use tooth tweezers or curved vascular forceps to break the mollusc after routine disinfection of the skin, squeeze out the contents, and then use iodine tincture to prevent infection. If you have a flesh grain and pain in the armpit, it is recommended to go to the hospital to clarify the cause and follow the doctor’s instructions to standardize the treatment.