I sprained ankle 5 weeks ago badly. In a boot w/ bandage. Twice this week I developed a rash. Once was mild while wearing bandage/boot & it went away immediately. But this morn I woke up with it worse after sleeping with nothing over the ankle. I have not changed soaps, detergent, etc so I doubt allergic reaction to something. Responded well to Benadryl cream earlier, and dr over phone said to wear a sock under bandage/boot. Unwrapped everything short while ago, but seems to have gotten worse as far as spreading & itchiness goes. Not responding to Benadryl cream at present. Please advise. Bumps are red & raised.