Sun spots on arms can be improved and removed by daily care, medication and physical therapy. 1. Daily care: you should do a good job of sunscreen, reduce the contact between the skin and the sun, if you want to go out, it is recommended to apply sunscreen and wear sunscreen clothes and hats. 2. Medication: Hydroquinone cream, vitamin E ointment, vitamin A acid cream can be applied locally, or you can choose to use vitamin E tablets, vitamin C tablets and other medications for treatment. 3. Physical therapy: photorejuvenation, fruit acid peeling and other methods of treatment can be carried out with the help of professionals. It is recommended that patients go to the hospital in time, under the guidance of professional doctors to standardize the treatment. The above drugs should be used according to the doctor’s prescription.