“…Although the cause of occurrence remains unknown, the role of previous or concomitant infections cannot be ruled out [2]. Endocrine disorders, mental disturbances, and immunoallergic diseases have a certain value in the occurrence of the disease [3]. In addition, there is a number of diseases associated with subcorneal pustulosis, such as monoclonal gammopathy, multiple myeloma, rheumatoid arthritis, Crohn's disease, pyoderma gangrenosum, Sweet syndrome, Crocker-Williams persistently elevated erythemа, pustular psoriasis, SAPHO syndrome (synovitis, acne, gangrenous pyoderma, osteitis).…”