In psoriasis, the skin forms red, thick patches covered by silvery scales. Most often psoriasis affects the scalp, elbows, knees and lower part of the back. More than 5 million Americans have psoriasis. Often called dermatitis, rashes can become itchy painful. Rashes have may causes, including allergic reactions, friction, prolonged exposure to heat and moisture, or contact with irritants, such as harsh chemicals.
Hand eczema is a common rash.
Many people with this problem start with dry, chapped hands that later become red, scaly and swollen. Warts - A virus causes warts. Warts usually are skin colored and feel rough. Medical expertise, history and a physical exam relevant to your skin problem. Any needed testing, such as lab tests, or a prescription for tests.