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is a chronic disease like any other disease say hypertension
.But it can easily and effectively be controlled by allopathy medicines .The cream which you are using is a good one and can be used for long,but has to watch for side effects .It should not be used on face at all.
There are lot many options for psoriasis like oral methotrexate
,cyclosporin,mycofenolate mofetil etc.Phototherapy
is one good and very safe option.In photo therapy one of the latest light used is Narrow band UVB therapy.It is very specific for psoriasis.
Certainly stress has a important role to play,so kindly avoid stress.There are certain medicines like anti inflammatory drugs and anti hypertensive drugs which can aggravate psoriasis.So keep a watch of it.
Frequent use of moisturizers is a must.Also use a moisturizing shower gel instead of soap.
I hope this would help you decide your treatment.