Menthol

What it does

Triggers the skin's cold receptors, producing a tingling, cooling sensation without actually lowering temperature.

Benefits

Feels immediately soothing on an itchy scalp and gives the impression the product is working. Mild temporary relief from itch.

Concerns & Risks

The relief is sensory rather than therapeutic. On skin that is already inflamed or broken, menthol frequently stings and can worsen irritation. A common reason people abandon a medicated shampoo.