Small meatballs growing in the armpit can usually be considered to be caused by filiform warts, soft fibrous tumor and so on. The patient needs to go to the regular hospital, find out the cause of the disease, according to the condition of targeted treatment. 1. filiform warts: patients with armpit skin filiform protrusions, accompanied by wart tip keratinization, can be considered to be human papilloma virus infection caused by filiform warts. The current treatment is based on laser, freezing and other physical therapy. 2. Molluscum contagiosum: patients with bulbous, pocket-like with a tip of the organism in the armpit, the surface is smooth, skin color or brown, soft and inelastic, can be considered to be a molluscum contagiosum, also known as the armpit of the skin; this disease occurs in the middle-aged and elderly people. The treatment of this disease is mainly based on laser therapy, and the larger ones can be surgically ligated or surgically excised; liquid nitrogen freezing, electrocautery and other methods can also be used; according to the size and scope of the affected area, the appropriate treatment should be taken under the guidance of professional doctors. It is recommended that the patient go to a regular hospital, after clarifying the cause of the disease, under the guidance of a professional doctor to receive treatment.