<s>[INST] I am a 56 year old female and have had a rash that started on the back of my knees one morning and with in a few day it spread all over my legs with a severe itching. This was in April a few days before easter. I have never in my life had a rash like this [/INST] Hi,It may be contact allergic dermatitis. Kindly consult the dermatologist for the perfect diagnosis and proper treatment.I would suggest...- apply mild steroid cream like mometasone - take antihistaminics like levocetirizine 5 mg daily till the itching is relieved - if needed, steroid tablets may be taken in tapering doseI hope this might help...Thanks.Dr.Ilyas Patel MD </s>