Arm spots are mostly caused by sun spots, seborrheic keratosis, etc., which can be improved by general treatment, topical medication and physical therapy.
1. sun spot: if the symptom is mild, ice bag can be used to apply cold compress locally to avoid re-exposure to sunlight, and do a good job of local sunscreen, which can be relieved on its own; if necessary, it can be treated with intense pulsed light, Q-tuning, picosecond and other treatments.
2. Seborrheic keratosis: should pay attention to sunscreen moisturizing, can be applied locally 40% hydrogen peroxide solution, can also be used for freezing technology, physical laser treatment.
These drugs above can have different degrees of adverse reactions, such as burning sensation and pain in the skin.