my two year old has been warm/hot (don t have a thermometer) since about 2. gave him ibuprofen at 2
Hello and Welcome to Ask A Doctor.  I have read your query and here is my advice.  With these symptoms your toddler most likely has a viral illness.  Many viruses can cause fever, a red rash of different sizes, and muscle inflammation(back pain).  Should he have a viral sickness, it ought to run its course in 3-5 days.  Hope I have answered your query.  If you have any further questions, I will be happy to help.  Arnold EDD, MD, FLAP