Bumps on the neck from the summer sun may be caused by solar dermatitis. It is recommended to get out of the environment and give topical and oral medications for treatment. 1. Get out of the environment: summer ultraviolet radiation is relatively strong, long time ultraviolet radiation, may form solar dermatitis, resulting in the local appearance of small pimples. It is recommended to get out of the environment in time, avoid sunlight exposure, with the passage of time, the symptoms can gradually reduce, disappear. 2. Topical medication: If the symptoms are obvious, you can use topical medication, such as glycerite lotion, boric acid solution, boric acid ointment, zinc oxide oil, etc., which has the effect of cleansing, protecting, relieving itchiness, and dissipating heat. 3. Oral medication: If necessary, with oral medication, such as vitamin C. If the itching is obvious, you can give loratadine, levocetirizine hydrochloride and other anti-allergic, anti-itch. Neck summer sun out of the pimples when it is recommended to hospital dermatology in a timely manner, to identify the causes, under the guidance of the doctor for standardized treatment, do not self-medication.