Scalp pain and irritation (or trichodynia) are pathological conditions that affect both women (in a greater percentage) and men (in a lower percentage). The pain felt on the scalp, spontaneous or caused by treatment, and in particular around the roots of the hair, may be more or less intense, alternating at times between periods of disappearance, associated with burning, tingling or itching.

The scalp is an ultra-specialized area of the skin, where hair is anchored. Like other hair, also the hair on the scalp originates from a hair follicle, called a bulb.