Skin infection or what? I do with this?

Hello Doctor This is something that i noticed while taking shower when i felt a little bit inflammation with a small amount of redness on both sides back of my knee. It's the end of 3rd day since then and it has become to this. I've tried Gentalene plus (Beclomethasone Dipropianate, Neomycin Sulfate and Clotrimazole Cream) for the first 2 days and In Night I used Candid Gold Antifungal Powder to keep it dry. and when all these didn't work as it was growing, On 3rd day, I gave a try to natural remedy i.e. applying turmeric powder with mustard oil for whole day...but at the end of the day, there's moderate inflammation and just because of that there's a moderate pain also....As i get up or get down, I feel that inflammation and pain. I'm also attaching the photos of the kneepit area to give you a clear visual. Now What should i do with this ? Please help.