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Parapsoriasis is a rare skin disease characterized by the appearance of flat or slightly raised lesions that are red and scaly, i.e. with pieces detaching from the epidermis. This condition is called parapsoriasis because its lesions are similar to those described in typical psoriasis, but their location and their cause are not the same. It differs depending on the distribution of lesions, plaque.


Symptoms of parapsoriasis are generally in the form of pink to reddish skin lesions that have a tendency to peel. The differences lie in the appearance of lesions:
  • large patches mainly on the trunk and the lower limbs in "plaque" parapsoriasis;
  • small raised lesions, isolated and randomly distributed over the trunk but also the root of the limbs in the "droplet" parapsoriasis.

These lesions usually evolve over several months or years.


Parapsoriasis is a disease that is not detectable through laboratory tests. This condition is diagnosed by a simple physical examination by a general practitioner, as requested by a dermatologist. The differentiation of this condition from other dermatoses (chronic skin disease) is not always easy. The removal of a lesion to perform a skin biopsy can help distinguish it from other conditions presenting similar symptoms.


Treatment of parapsoriasis may be the use of steroids applied topically. Other treatments using ultraviolet rays are effective over several sessions.


This skin disease can unfortunately not be prevented.