The bumps are often light-colored. They usually appear on your upper arms, thighs, and buttocks, sometimes with redness or swelling. They can also show up on your face, but that's less common.
Keratosis pilaris is caused by a buildup of keratin, the protein that protects skin from infections and other harmful things. The buildup forms a plug that blocks the opening of a hair follicle, but doctors don't know what triggers the buildup.
If you have dry skin, you're more likely to have keratosis pilaris. It's usually worse in the winter months, when there's less moisture in the air, and then may clear up in the summer.
Your doctor can diagnose keratosis pilaris by looking at your skin. You don't need to be tested for it.
What You Can Do
You can't prevent keratosis pilaris, but you can keep your skin moist to lessen its effects.
Some simple things can help keep your skin comfortable.
- Don't scratch at the bumps or rub your skin roughly.
- Use warm water rather than hot for bathing and showering.
- Limit your time in the water.
- Try soap that has added oil or fat.
- Use thick moisturizers generously on the skin.
- Add moisture to the air in your home with a humidifier.
There's no cure for keratosis pilaris. But moisturizing lotions or creams may help your skin look and feel better. A variety of these are available over the counter, but you'll need a prescription for stronger versions.
Two types of products that go directly on the affected skin often improve keratosis pilaris. You'll need to use them daily for several weeks before you'll see a change. You should follow the suggestions above, too, for long-lasting results.