post-inflammatory hyperpigmentation

Why do my mosquito bites leave behind dark permanent hyperpigmented scars?

1. Introduction Mosquito bites leave behind dark hyperpigmented scars due to a dermatological process known as post-inflammatory hyperpigmentation. The acute inflammation and subsequent scratching of the bite disrupt the basal layer of the epidermis, triggering melanocytes to overproduce melanin, which then drops into the deeper dermal layers where it becomes trapped and appears as a … Read more

Why do I get a dark hyperpigmented spot exactly after a minor bug bite heals?

1. Introduction The dark, hyperpigmented spot that persists exactly where a minor bug bite recently healed is a dermatological condition known as post-inflammatory hyperpigmentation. When an insect breaches the skin, it triggers a localized immune response to repair the trauma and neutralize any injected salivary proteins. This intense, acute inflammatory cascade inadvertently stimulates the surrounding … Read more