Small granules on the arms may be related to diseases such as keratosis pilaris, eczema, common warts, etc. Removal methods include topical medication, oral medication and physical therapy. 1. Keratosis pilaris: Most of the growth in the outer part of the upper arm and other parts of the light red or skin color pimples, the surface is rough, chicken skin-like. Often do not need treatment, if it affects the aesthetics can be prescribed topical retinoic acid drugs, salicylic acid ointment, etc., but also under the guidance of the doctor oral retinoic acid drugs and other treatments, if necessary, can be used to improve the symptoms of laser therapy, etc.. 2. Eczema: If the small particles on the arm are symmetrically distributed erythema, papules, with a tendency to ooze, with severe itching symptoms, may be eczema. It can be treated with topical hydrocortisone cream, pimecrolimus cream and other medications as prescribed by the doctor, as well as oral antihistamine medications such as loratadine tablets. 3. common warts: the disease is caused by human papilloma virus infection, often manifested as skin color or brown, raised in the skin surface of the skin superfluous. The patient can use fluorouracil cream, imiquimod cream, etc. under the guidance of the doctor, and can also follow the doctor’s instructions to use cryotherapy, laser therapy, photodynamic therapy and other methods to remove warts. It is recommended to go to a regular hospital to see a patient with a long arm, after a clear diagnosis, strictly comply with the doctor’s instructions to standardize the use of medication.