The small dots in the armpits may be molluscum contagiosum, common warts and other skin abnormalities. 1. Molluscum contagiosum is a kind of dermal connective tissue hyperplasia and epidermal hyperkeratosis disease, the common symptom is the epidermis appear flesh-colored or dark brown with or without the tip of the organisms, can occur in the armpit, neck, eyelids, etc., and some with the tip of the organisms can be tear-drop shape, can be twisted and inflammation, tenderness, or necrosis. 2. common warts: is by the skin mucous membrane infection of human papilloma virus after the production of papillary benign superfluous organisms, the initial damage for the flat horny papules, can gradually become bigger, become soybean size brown or skin color papules, can be papillomatous proliferation, hard texture, surface rough, its preferred in the hands, face and so on place. The armpit long small dots suggest timely medical treatment, clear diagnosis, targeted treatment.