Small flesh particles in the armpits may be related to dermatomes, filiform warts, sebaceous gland infections, etc. 1. Skin flab: It may be related to repeated skin friction and overgrowth of skin fibers. They may appear in the neck, armpits and other folds of the skin in various sizes. 2. Filiform warts: caused by human papilloma virus infection, related to low autoimmune system, can be spread through close contact or direct contact with others. It can be spread through close contact or contact with others. It is found in the neck and armpits, and is mainly manifested as a single soft filiform protrusion. 3. Sebaceous gland infection: sebaceous glands normally secrete sweat, which is discharged through small tubes. Because they are connected to the outside world, they are easily infected by external bacteria. When the sebaceous glands are infected, the inflamed skin protrudes outward, forming small granules. When the appearance of small meatballs under the armpit, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment or therapy.