Scalp psoriasis is caused by an autoimmune malfunction in which the immune system mistakenly attacks healthy skin cells on the scalp. This immune system overreaction triggers inflammation and causes skin cells to grow much faster than normal-new cells form in days instead of weeks, leading to a buildup of thick, scaly plaques on the scalp
. Genetics play a significant role, as scalp psoriasis often runs in families, but having the genes linked to psoriasis does not guarantee its development. Environmental factors and triggers can also provoke or worsen the condition. Common triggers include:
- Skin trauma such as cuts, scrapes, or sunburns
- Infections like streptococcal throat infections
- Stress
- Cold, dry weather
- Certain medications (e.g., prednisone, hydroxychloroquine, lithium)
- Alcohol and tobacco use
- Other inflammatory or autoimmune diseases, including HIV
In summary, scalp psoriasis results from a combination of genetic predisposition and immune system dysfunction, with various environmental triggers contributing to its onset and flare-ups
