What to Do About Post-Mosquito Bite Hyperpigmentation
Disease description:
Today, I noticed many dark marks on my sister’s legs. She said they were caused by mosquito bites—she had intense itching before and scratched them repeatedly; after healing, these marks remained. So, I’d like to know how to treat post-mosquito-bite hyperpigmentation.
Doctor's answer (1)
Dr. Liu Wan
Post-mosquito bite hyperpigmentation should first be managed with observation and conservative treatment, which typically resolves spontaneously within 3 to 6 months. Alternatively, oral medications such as tranexamic acid may be used, topical agents like hydroquinone cream for depigmentation, or laser therapy (e.g., 755-nm laser). Pharmacological treatments act slowly, usually requiring 1–2 months for noticeable improvement, but are associated with minimal systemic side effects. Laser therapy offers faster results but generally requires 2–3 sessions for optimal pigment reduction and tends to be more costly. Regardless of the chosen approach, patients are advised to practice strict sun protection in daily life.
