Skin irritations are a common problem that can be caused by a variety of factors. Rashes, which are six letters long, are a type of skin irritation that is characterized by redness, itching, and sometimes swelling. Sores, which are five letters long, are another type of skin irritation that can be painful and cause the skin to break open. Both rashes and sores can be caused by allergies, infections, or other skin conditions.