What is the study of hair and its diseases called?

The study of hair and its diseases is known as trichology. This field focuses specifically on the structure, function, and diseases of the hair and scalp. Trichologists are specialists who diagnose and treat conditions related to hair loss, scalp irritations, and other hair-related issues, making their expertise essential for individuals experiencing concerns about their hair health.

Dermatology, while closely related, is a broader medical field that deals with the skin, its diseases, and the associated hair and nails. Oncology pertains to the study of cancer, which does not specifically focus on hair or its diseases. Cytology is the study of cells, particularly in a pathological context, and also does not pertain specifically to hair. Therefore, trichology is the most accurate term to describe the study focused solely on hair and its associated ailments.