Seborrheic dermatitis is a common chronic inflammatory skin disorder that primarily affects sebaceous gland-rich areas such as the scalp, face, chest, and back. The condition is characterized by red, scaly, greasy, and flaky skin lesions, with symptoms varying among individuals in severity and distribution. The prevalence of seborrheic dermatitis ranges from 1% to 10% in the general population and is more commonly observed in adolescents, young adults, and individuals above 50 years of age. Although the exact cause of the disease is not fully understood, the yeast species Malassezia is considered a major contributing factor in the inflammatory process. The disorder is often associated with dandruff, though the relationship between the two conditions remains unclear. Seborrheic dermatitis commonly recurs even after treatment and may significantly affect quality of life. Proper hygiene may help manage symptoms; however, poor cleanliness is not considered the cause of the disease. This review highlights the clinical features, prevalence, contributing factors, and recurrent nature of seborrheic dermatitis.
Nichat et al. (Fri,) studied this question.