**Keratosis Spine** is a relatively rare disease, but it causes a lot of inconvenience to the patient, although it is not fatal. The disease manifests itself in the form of flat scales, which are usually picked up with a fingernail and removed without acute pain. Over time, the number of crusts decreases and they form less frequently. They are very similar to smegma deposits, but differ in pattern. The shiny surface of smegmatic crusts indicates that they were formed with the participation of the secretions of the sebaceous glands; changes occur with these formations over time. First, elasticity increases, then the scales become thinner. After some time, cracks appear on their surface, which deepen and lead to the formation of chronic wounds, and sometimes excoriations (erosions). The scales of spines are usually thick and fit tightly to the surface of the nail bed. If hygiene standards are not observed, fungal infections multiply on the surface of the stratum corneum. The fungus begins to capture the nails under the scales. In addition, microsporia is just one of numerous infectious diseases, the sources of which are also microtraumas of the skin, contaminated skin, and the use of contaminated instruments. For example, when insufficiently disinfected scissors are used when cutting a manicure. As a result, the fungus is easily transmitted through household contact, due to close contact with a sick person.