 [ Symptoms ] i have had the flu for a few days and now have developed a rash on my fore arms and hands and my knees and inner thighs i had been running a fever of varying degrees between 99 and 101 my normal temp is 97 6 a friend saw the rash and said it is a fever rash but i can not find any info on it it does not itch or hurt just looks very red and angry [ Disease ] you may need to see our primary care medical provider or an allergist for further testing while you may not know of any obvious environmental exposures there can be numerous hidden ones clearly something is triggering your extensive hives so it would be in your best interest to try and track down the culprits unfortunately this is not something that can be done blindly over the internet