Sun spots on arms can be removed by lifestyle habits, medication and laser treatment. 1. Improve living habits: minimize going out. If you want to go out, apply sunscreen, wear sunscreen clothing and so on. 2. Medication: you can use hydroquinone cream, arbutin and other drugs to reduce the production of pigment, but also oral vitamin C and other drugs. 3. Laser treatment: the main principle of laser sunspot removal is to utilize the thermal effect of laser to break the melanin particles in sunspot through the high heat of laser, and then discharged out of the body through the metabolism of human body, so as to achieve the effect of removing sunspot. If sun spots appear on the arm, you need to go to the hospital as soon as possible, by the doctor according to the specific conditions, to formulate individualized diagnosis and treatment plan, so as not to delay the condition. The medication should be used according to the doctor’s prescription.