The head of the small meat grain may be viral warts, soft fibrous tumor, folliculitis and other reasons. 1. Viral warts: human papilloma virus infection caused by common warts can lead to the emergence of superfluous skin, thus causing the head to grow small meatballs. 2. Nevus pigmentosus: a skin tumor originating from melanocytes, which can occur in any part of the body’s skin, and may also lead to the growth of small grains of flesh on the head. 3. Folliculitis: an inflammatory reaction of the scalp hair follicles secondary to bacterial infection, which may also lead to a small bump on the head. There may be other reasons for the growth of small grains on the head, and it is necessary to go to the hospital in time to check the cause of the disease.