What is the study of the skin and its diseases known as?

The study of the skin and its diseases is known as dermatology. This specialized field of medicine focuses on diagnosing and treating various skin conditions, including acne, eczema, psoriasis, and skin cancer, among others. Dermatologists possess in-depth knowledge of the skin's anatomy, physiology, and various pathologies, allowing them to provide effective treatments and interventions.

In contrast, cosmetology primarily pertains to beauty treatments and services, including hair styling, nail care, and skin care, but it does not specifically focus on skin diseases. Aesthetics, while related to skin care and beauty practices, typically involves the application of products and treatments aimed at enhancing appearance rather than diagnosing or treating skin diseases. Dermaplaning is a specific skin treatment that involves exfoliating the skin's surface to improve its appearance and texture but is not a field of study dedicated to skin diseases. Thus, the term that encompasses the study of skin and its ailments is dermatology.