Ducray Sensinol Physio-Protective Treatment Shampoo is a gentle and soothing shampoo that not only cleanses but also soothes even the most sensitive scalps. With 83% ingredients of natural origin, its hypoallergenic formula is perfect to combat a variety of signs of a weakened scalp, such as itching, tingling, burning, tightness, and pain. Polidocanol, the key ingredient, is a local anesthetic and antipruritic that quickly and effectively relieves discomfort, as confirmed by 74% of clinical trial volunteers, who reported an immediately soothing effect after just one application.