Dermatology is the science that deals with the study of skin. Since skin is often referred to as the largest organ of the body, dermatology too has a large scope with subspecialties like Cosmetic dermatology, dermatopathology, Trichology, Immunodermatology, Pediatric dermatology, Teledermatology and Dermatoepidemiology to name a few. Disorders of the skin vary greatly in symptoms and severity. They can be temporary as well as permanent, and painless or painful. Some very common disorders include acne, blisters, cold sores and other serious disorders could include hives (allergic reactions), actinic keratosis, rosacea, carbuncle, latex allergy, eczema, psoriasis etc.