Hi, Can I Answer Your Health Question? Please Type Your

Hi, can I answer your health question? Please type your question here...
My husband got a bad sunburn on his legs while tubbing down the river. That was a week ago. Now after blisters the flesh under the red is turning purple. He had crushed that lower leg and ankle yrs ago in an accident and afraid it could be bad circulation. He is also on Humira so we r concerned. Any advice? Thx!