Why does it itch when a wound starts healing?« Back to Questions List

Itching is due to the release of histamine, a chemical substance which stimulates nerve endings.When tissues becomes inflamed due to bacterial invasion, histamine is released. This increased the blood flow in the wounded areas.The number of white blood cells also increase during healing.White blood cells contain large amounts of histamine.Histamine from surrounding cells diffuses into the skin nearby and stimulate the nerve endings, which results in itching. itching