Skin allergy symptoms like redness, itching, and swelling often go away on their own in a week or two, with or without treatment.
You can do some things to make it more comfortable in the meantime.
Avoid contact. It might sound obvious, but it’s worth a reminder. You can’t use or touch what triggers your allergy.
Chill out. A cool compress or shower can help calm a fiery rash. Gently pat dry and then moisturize.
Soak it. Colloidal oatmeal is oatmeal ground to a powder, so it mixes well with water. It can calm inflamed skin for some people. But other folks can have reactions to it. To try it, use lukewarm water. If it’s too hot, it can irritate and dry your skin.
Go baggy. Don’t wear tight clothes. They can irritate your rash. Play it loose and cool with breathable fabrics like cotton.
For severe symptoms, try a damp dressing. First find a soft cotton piece of clothing, like a long-sleeve T-shirt or long underwear. Soak it in water, wring it out, and then put it on. Wear something over it that's snug, but not too tight.
If you have a skin problem that doesn't go away on its own, always get it checked out by a doctor -- even if it gets a little better from a home treatment. It could be a sign of a serious medical condition.