Pityriasis rosea is a skin disease that causes small, scaly circular patches on your skin. The patches are tan or rose-colored and are itchy.
You get a patch of skin on your chest, belly area, or back that is:
This patch is called a herald patch or mother patch. Sometimes, you feel weak and tired, have a headache, or have joint pain a few days before the patch appears.
After 1 to 2 weeks, you may have:
In children, patches may start in the groin area (the area between your upper thighs and your belly) or under the arms and spread. Children and pregnant women with pityriasis rosea may have patches with little or no scaling.