A good barber or stylist will get to know your hair and will help you choose a style that works to maximize your appearance and career. Men will spend hours every week waxing the car, but few want to spend a few seconds putting a bit of product in their hair. Dandruff and oily hair detract from your appearance. Dandruff, also called seborrheic dermatitis, usually requires a prescription shampoo from your dermatologist. If you suffer from scalp psoriasis, you should be under the care of a dermatologist. Hair loss has many causes and a dermatologist is trained to perform scalp biopsies and diagnose and treat these disorders which can range from hereditary, hormonal, metabolic, infectious, and unknown causes. Common baldness can be reversed if treatment is started early with medications and low level laser (LaserCap).