A lot of small skin growths can be warts caused by a viral infection or keratosis pilaris. There are two possible types of warts from viral infections, common warts and infectious molluscum contagiosum. The most common warts are cauliflower-like or papillary, which is the proliferation product of the human papilloma virus that stimulates the skin for a long period of time, the treatment is to laser the warts off, and then use interferon ointment to apply anti-recurrence treatment; infectious mollusks need to use a needle to pick out the warts. If it is a keratosis pilaris, then it is a hereditary disease, especially during puberty, and there is no complete cure, but the symptoms can be improved with the use of medication. Commonly used topical medications include retinoic acid cream, urea cream or salicylic acid cream. There are a lot of small particles on the skin, it is recommended to go to the dermatology department of a specialized hospital for consultation and treatment.