Psoriasis - causes
The exact cause of psoriasis is still unknown. Most experts say the disease is genetic, it is inherited. About a third of people with psoriasis have at least one blood relative with the disease. In any case, it is unclear whether genetic factors act alone in determining this condition or other environmental factors also have a role in triggering the disease.
Studies have shown that the immune system has a role in causing psoriasis because in the abnormal skin layers was found a large number of leukocytes.
There are a number of factors that may cause psoriasis, and some of them are possible to be avoided. Cold and dry climate is a specific factor that can aggravate the symptoms of psoriasis. Stress, smoking and alcohol drinking also are risk factors for this condition. Infections, especially throat infections like thrush or strep throat are also common causes of psoriasis. This is especially common among children infected with streptococcus.
Skin lesions, regardless of location, but especially those near the nail are also causes of this condition. Sunburn or bug bites are included here. Psoriasis may be triggered or aggravated by medications like: non-steroidal anti-inflammatory drugs, beta blocking agents used to treat heart disease and hypertension and lithium salts. That is why is very important that people with psoriasis consult the doctor before taking these kind of drugs.
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