Old age, I have about the same symptoms, they 1st did call it cellulitis, they started giving me a bunch of anti-biotics, they did not help, I also had inflamation and pain I don't think it is old age as I am 52 years young (ha! Ha!) I know I am no spring chicken but my situation started as a fall, then it became swollen, red, shiny the burning was horrible, I went to several dr's., they finally sent me to a Dr. That did an emg(electromyography) nerve test and it showed I had peripheral neuropathy, rsd(reflex sympathetic dystophy) but I also have fibromyalgia which is a lot of the pain situation. You might think of checking out a neurologist or whomever does this test or at least a skin Dr. As you have a right to another opinion as I know this is miserable as I couldn't even put a sheet over my legs. I hope this has helped and the situation gets better, I do hope it is just something minor!
Sincerely,
sandy