A dermatologist is a physician who specializes in the diagnosis and treatment of conditions and diseases of the skin, hair and nails. Dermatologists are certified by the American Board of Dermatology after a one-year general internship and 3 years of dermatology residency. Dermatologists manage both acute and chronic skin rashes such as acne, eczema and psoriasis; skin infections such as impetigo, cellulitis and shingles, benign growths such as moles and warts; skin cancer using destructive techniques and surgery; hair and nail disorders such as hair loss and nail fungus. It is estimated that dermatologists study , diagnose and treat over 200 skin conditions in a career. Dermatologists are excellent diagnosticians and can often distinguish between conditions that share similar signs and symptoms. When necessary, they are skilled in performing biopsies to clarify the diagnosis and have the necessary surgical skills to manage most skin growths including skin cancer. Furthermore, dermatologists are skilled in helping your skin look its best through prevention and wellness techniques and offering the latest in rejuvenation techniques such as chemical peels, botulinum toxin, fillers and laser treatments.