I've been taking amlodipine, perindopril and allopurinol for a couple of years to control high blood pressure and gout. A couple of years ago I discovered white dry patches on my knees but thought nothing more of it. in the last year I've had raised circular lesions on both my upper legs and some in the same place symetrically, A month ago I found light coloured areas on my face. I've been taken off allopurinol but I'm still getting new lesions. My thoughts now are that amlodipine might be the cause. What do you think