Why do cysts itch when erupting?

Cysts can itch when erupting due to the inflammation and irritation of surrounding skin as the cyst contents are released. The body's immune response to this irritation can trigger histamine release, leading to itching. Additionally, the exposure of nerve endings during the cyst's rupture may contribute to the sensation of itchiness. Overall, these factors combined create a sensation that can be uncomfortable and itchy when a cyst erupts.