Hyperpigmentation after laser surgery can be improved by avoiding sun exposure, oral vitamin C, topical hydroquinone, and follow-up treatment if necessary. 1. Avoid sun exposure: Hyperpigmentation after laser treatment is a relatively common adverse reaction, it is generally believed that this phenomenon belongs to the inflammation of secondary hyperpigmentation, which may be related to the treatment of sunscreen is not strict and other factors lead to the treatment, so it is recommended to strictly sunscreen after laser treatment, go out and use sunscreen, umbrellas and so on. 2. Use of skin care products: after treatment, you can take vitamin C orally, external use of skin care products containing hydroquinone, to promote the absorption of skin pigmentation, in order to alleviate the phenomenon of post-laser hyperpigmentation. 3. Timely follow-up: post-laser hyperpigmentation can be gradually restored and alleviated in 1-3 months. If there is no significant improvement or aggravation of the hyperpigmentation, it is recommended that a timely follow-up evaluation be made, and then laser and other treatments to improve the condition, if necessary. Hyperpigmentation after laser treatment is a common adverse reaction, if there is no recovery for more than 3 months or local skin erythema, blisters, etc., then it is recommended that the doctor for timely treatment for follow-up assessment, so as to avoid adverse consequences.