Why does herpes itch?

Herpes itching is caused by the body's response to the virus. When the virus enters the body, it replicates and infects nerve cells. This causes inflammation and a sensation of itching. Additionally, the body releases histamine and other chemicals in response to the virus, which can also cause itching. These substances cause the small blood vessels near the infected site to dilate, resulting in redness, swelling, and itching of the skin.