Arms with goose bumps physiological does not require special treatment, vitamin A deficiency, eczema, keratosis pilaris caused by external or oral medication. 1. Physiological: in the cold or excessive tension stimulation of sympathetic nerve excitation, adrenaline increases, causing skin contraction of the hair muscle, thus causing goosebumps like lesions, usually without treatment. 2. Vitamin A deficiency: Vitamin A deficiency makes the skin dry, flaky, keratinization of hair follicles, which can also cause arm pimples-like lesions. It can be treated with vitamin A supplements such as vitamin A softgels. 3. Eczema: glucocorticoids such as halomethasone cream can be used externally, severe itching can be used anti-allergic drugs such as cetirizine, secondary infection can be applied to antibiotic drugs such as roxithromycin and so on. 4. Keratosis pilaris: can be used externally moisturizing agent, at the same time, external retinoic acid cream or oral isotretinoin drugs to soften keratin. Can only relieve the symptoms, can not be eliminated. Arms with goose bumps recommended timely consultation, under the guidance of the doctor line targeted treatment, not self-medication, so as not to cause adverse consequences.