Phytosphingosine is a natural component of the epidermis. It plays a key role in the building and maintenance of the skin defense barrier. Lack of phytosphingosine is associated with: seborrheic disorders, keratosis, alterations of the lipidic skin surface layer, bacteria and yeast proliferation. Local application of phytoshingosine helps restore the skin lipid barrier, control the production of scale and sebum and control local flora. The excipient of DOUXO® SEBORRHEA Spoton allows the diffusion of the product through the lipidic elements of the epidermis.