It is a chronic recurrent Paulo squamous skin disease with silvery grey scaling papules or flakes. Although the condition may occur on any part of the body, the most common sites are surfaces over the knees and elbows. In Ayurveda, it is known as eka-kushtha. Blood impurities associated with some emotional factors are mentioned in Ayurveda as cause of the disease.
Since there is severe irritation on these patches the patient is unable to resist scratching. By scratching, scales come out of these patches and a shiny silver skin is exposed below the scales which is the characteristic feature of the disease. Because of violent itching, watery exudation and blood come out of these patches with produce a burning sensation.
Khadira, sariva, manjishta, chandan, raktachandan, vasa, patola, guduchi, amalaki, madanphala, haridra, yashtimadhu, kutaja, daruharidra are most useful herbs in psoriasis. Arogyavardhini vati, kaishora guggulu, gandhaka rasayan, amritadi guggulu and panchatikta ghrita are ayurvedic formulations for psoriasis.