I am experiencing skin redness or irritation and rash (quality: itchiness) .

Doctor can examine: Rashes are difficult to describe in words. Generalized spots that itch may be part of an allergic reaction, an irritant or chemical reaction, an infection, or a disorder inside the body. "Generalized" means the rash is all over the body. Bluish or purplish spots may be blood spots. Sometimes, spots have unknown causes. Rashes at work may be due to chemicals in gloves, solvents, detergents, etc...