Red rash?

I have a red rash that doesn't itch or hurt nor is it bumpy. But it's on both knees ( left one more severe and also get less severe as it reaches my foot.) Now here's the thing all week my entire left leg and foot have been through a lot I hairline cracked my small toe on a couch, got stung on my foot twice,hit my ankle on a cart, hit my knee on the coffee table, and scratched my leg until it was raw because I'm being eaten alive by bugs  a lot. So, any ideas?