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Psoriasis is a chronic problem,but it can be definitely controlled by allopathy medicines .You should also see that it does not spread all over the body and does not effect the joints as-well.When it involves the joints it is called psoriatic arthritis
.Both body and scalp psoriasis
can be effectively controlled .You should also understand that stress can aggravate psoriasis .Even pain killer like ibuprofen can provoke psoriasis.
Various medications available for psoriasis are :Methotrexate
,acitrtin(retinoids),cyclosporins etc.These medications should be taken strictly under dermatologists supervision and also needs to undergo some blood investigation before taking this.These are very effective medicines even in sever psoriasis.In females special precautions need to be taken which your dermatologist would explain you in detail.
One of the very safe option apart from above medicines would be PHOTOTHERAPY( narrow band UVB & PUVA) .These are chambers containing specialized lights effective in psoriasis. These light therapies are followed all over the world.
Along with all these you should always use a moisturizing soap or body wash followed by a moisturizing cream for the body. Topical steroid
being the mainstay of the treatment.
So ,consult a dermatologist
who has all the above facilities.