(HealthDay News) — Psoriasis is an immune system disorder that causes red, scaly patches of skin.
The American Academy of Family Physicians says the following triggers can cause the disorder to flare:
- Having an infection, such as the common cold or strep throat.
- Having a disease that weakens the immune system.
- Being under stress.
- Being a smoker.
- Irritating the skin.
- Being exposed to cold.
- Taking certain medications, such as beta blockers for high blood pressure.