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Individuals who get affected by psoriasis usually have a family history of it. Psoriasis is a common skin condition even though not everyone who has a family history of psoriasis will be affected. In the UK, it has been noted that a great number of people have been affected by psoriasis, with plaque psoriasis accounting for about 80% of these cases.

Psoriasis can affect anyone regardless of the age. Most people who get affected by this skin condition develop psoriasis between the age of 15 & 30 years. Research has shown that about 75% of the affected people already have psoriasis before age 40. Also, psoriasis is commonly known to develop between age 50 & 60 years in older people.

Inverse psoriasis and guttate psoriasis affect infants and young children.


Scientists are still working to know the internal events that take place inside the body leading to the development of psoriasis. We are, however, certain that psoriasis is not a contagious condition. You cannot contract psoriasis by swimming in the same pool or through sexual intercourse.

According to some scientific studies, a person’s immune system, as well as the genes, plays major roles in the development of psoriasis. It seems that several genes must interact to cause this chronic skin condition.

Scientists have also shown us that not everyone who inherits the genes for psoriasis will be affected with psoriasis. It seems that an individual must inherit the “right” combination of genes, and be exposed to a physical trigger before psoriasis can develop.

As contributed by affected persons, the following are the factors that trigger the manifestations of psoriasis:

  • A stressful event.
  • Strep throat.
  • Use certain medicines, such as lithium, or malaria prophylaxis medications.
  • Cold, dry weather.
  • A cut, scratch, or bad sunburn.