### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
hello doctor, iam suffering from severe psoriasis on my abdomen, buttock, legs and back. I also have severe scalp psoriasis and have been finding it extremely embarrasing to interact with any one. I always applied topical ointments like dovobet, dermobet or tenovate with hardly any improvements as they kept coming back in large areas over the body.For the scalp i applied Ionax T shampoo and propysalic lotion but within few hours they dried up againnow my doc prescribed me alaspan (once in the morning after breakfast) and Xevor at bedtime along with propysalic NFG for body application and saliben for scalp.iam too scared to try out new medicines as i fear larger outbreak.pls. help and advisedesperately seeking advisergds

### output:

Hello, Welcome to Chat Doctor, I understand that you have extensive psoriasis, and it is not coming under control with topical steroids and salicylic acid preparations. If more than 20% body surface area is involved you may even try systemic treatment for psoriasis like methotrexate, accretion under supervision of a good dermatologist. You may also try phototherapy (Narrow band UVB or PVA) for extensive psoriasis if you have not tried it before. Propysalic NF is a combination of topical steroid and salicylic acid and Alaskan and Never are antihistamine tablets. They are alright and don't worry about them causing outbreak. Follow up with your doctor as advised and discuss other options mentioned above. Do not take stress as it worsens psoriasis. Hope this helped, Take care.