A dermatologist is a medical doctor who specializes in diagnosing and treating conditions related to the skin, hair, and nails. They handle a variety of issues, including acne, eczema, psoriasis, and skin infections. Dermatologists also perform skin cancer screenings and can provide treatments such as topical medications, laser therapy, and surgical procedures. In addition to treating diseases, dermatologists often focus on cosmetic procedures to improve the appearance of the skin. This can include treatments like Botox, fillers, and chemical peels. They play a crucial role in educating patients about skin care and prevention of skin-related issues.