Causes of scalp psoriasis
Scalp psoriasis usually starts when the immune system becomes overactive and pushes skin cells to grow too
quickly. These extra skin cells build up on the scalp and form thick, dry, itchy patches. The exact reason can
vary from person to person, but some common causes and triggers include:
Overactive immune response
Psoriasis happens when the immune system sends the wrong signals to the skin. As a result, new skin cells grow too
fast and create scaly plaques on the scalp.
Family history
If psoriasis runs in the family, a person may have a higher chance of developing it. It may not appear in every
family member, but genetics can play a role.
Mental stress
Stress does not directly create psoriasis in every case, but it can trigger flare-ups or make existing scalp
psoriasis worse.
Scalp injury or scratching
Cuts, rubbing, harsh combing, burns, or repeated scratching can irritate the scalp. In some people, psoriasis
patches may appear in irritated or injured areas.
Infections
Certain infections, especially throat infections, may trigger psoriasis in people who are already prone to it.
Cold or dry weather
Dry weather can make the scalp tighter, itchier, and more flaky. Some people notice their psoriasis becomes worse
in winter or dry seasons.
Smoking and heavy alcohol use
Smoking and frequent heavy alcohol use may increase inflammation in the body and make psoriasis harder to control.
Certain medicines
Some medicines may trigger or worsen psoriasis in selected patients. If scalp psoriasis starts after taking a new
medicine, the patient should talk to a doctor instead of stopping it suddenly.
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