Hello sir. I am 30 years female. Had knee ligament tear and knee tpf 2 years ago. Had surgery with implant inside placed at knee. Now suddenly I got blisters on my ankle which was itchy and burning. Then I applied Fucibet cream and tied crepe bandage on blister tightly and so blister broke down. Now they are like open wound like drilling wound. Layers of skin is visible. Fluid is not oozing. I have taken sefdin and using creams from 25 days. But now my wound is same. And its burning a lot at night times. The burning is intense that its waking me away from sleep. please kindly help me out of this situation. Is it venous ulcer. Or pressure ulcer am afraid.