What Causes Psoriasis?

Psoriasis is a long-lasting skin condition that causes red, scaly patches on your skin. About 2-3% of people worldwide have psoriasis. Understanding what causes psoriasis can help you manage flare-ups and work with your doctor to find the right treatment.

The Immune System Connection

Psoriasis happens when your immune system becomes overactive. Normally, your body makes new skin cells every month. With psoriasis, your immune system tells your skin to make new cells in just days instead of weeks. These cells pile up on the surface, creating thick, scaly patches.

Genetics Play a Role

Psoriasis often runs in families. If one of your parents has psoriasis, you have a higher chance of getting it too. Scientists have found certain genes linked to psoriasis. Studies of identical twins show about 70% will both have the condition, proving genetics matter. However, you need more than just the genes—something must trigger the disease to start.

Common Triggers

Several things can trigger psoriasis or make it worse. Stress is one of the most common triggers. Infections, especially strep throat, can set off a type called guttate psoriasis. Skin injuries like cuts, scrapes, or sunburns may cause new patches to appear where the skin was hurt. Certain medications, including lithium and some blood pressure drugs, can also trigger flare-ups.

Does Psoriasis Itch?

Yes, psoriasis often itches. Studies show 60% to 90% of people with psoriasis experience itching. Many say the itch is the most bothersome symptom. The patches can also burn, sting, or feel tight. Try not to scratch, as this can make patches thicker and larger.

Lifestyle Factors

Some lifestyle habits can make psoriasis worse. Smoking increases your risk and makes symptoms harder to control. Being overweight is linked to more severe psoriasis. Alcohol can trigger flare-ups in some people. Cold, dry weather often worsens symptoms, while sunlight sometimes helps.

Important Facts

Psoriasis is not contagious. You cannot catch it from touching someone else's skin. It is also not caused by poor hygiene. Psoriasis is a medical condition that needs proper treatment. If you think you have psoriasis, see a dermatologist who can create a treatment plan for you.