what causes a person to itch?

Question

not like a disease but just a regular itch- not from feathers and stuff either

Answer 1

This is really a biology or medical question.

But the answer to your question is that "an itch" is a sensation felt on an area of skin that causes a person or animal to desire to scratch that area. Itching can be related to anything from dry skin to cancer.

The central chemical involved in itching is histamine, a molecule released by mast cells in the skin. It binds to local nerve endings on specific receptors. An itch from cutaneous (skin-related) stimuli, such as movement of small hairs on the body, was thought to be transmitted along the same pathway as pain, although recent research in 2001 has found that itching has its own neural pathways. However, as with pain, a histamine-induced itch travels via the spinothalamic tract, but in fibres specific for itch.