Elbow pigmentation can be caused by excessive friction, post-inflammatory hyperpigmentation, and seborrheic keratosis. It can be improved by general treatment, medication and physical therapy. 1. Excessive friction: frequent work at the desk, the elbow is prone to friction, resulting in localized skin thickening and hyperpigmentation, which is a normal phenomenon. It is recommended to do a good job of local care, reduce friction, can help improve. 2. Post-inflammatory hyperpigmentation: For example, after the treatment of allergies, mechanical injuries, drug reactions, skin infections and other diseases, the inflammatory products stimulate the epidermal melanocytes to synthesize melanin, resulting in increased melanin. Inhibition of melanocyte proliferation drugs can be given, such as tranexamic acid, azelaic acid, etc., which can inhibit melanocyte proliferation and reduce hyperpigmentation. 3. Seborrheic keratosis: Seborrheic keratosis is a kind of benign epidermal tumor, mostly seen in the elderly, with small, flat patches or plaques on the skin, covered with greasy thick scabs. If you feel that it affects your aesthetics, it can be treated by cryotherapy, laser therapy and other physical means. Dark elbow color, it is recommended to pay attention to sun protection, reduce friction, if necessary, go to the hospital dermatology department, clear diagnosis, symptomatic treatment, the above drugs need to be used in accordance with medical advice.