I am experiencing skin rash (quality: itchiness) . the following also describes me: skin redness or irritation. what should i do?

Many possibilities..: Itchy spots can be from many causes, such as: hives, viral infections, other infections, medication causes, hot-tub rashes, heat rashes, reactions to creams or lotions, allergic reactions to various things (including foods), internal disorders (such as kidney disease, auto-immune disease), etc... That means a rash that persists or is worrisome in appearance should be checked by a doctor.