I may be having my third major relapse. I have all day fever (about 100 degree) plus sever chills/aches/pains/shaking for last 8 days. If I take advil, I can reduce the fever enough to shower or eat etc. My question is....for how long can one take advil everyday ? Thank you if anyone has answers. Fever was not a major symptom for my other relapses. I was at activity level 2-2.5 (mostly homebound) before this fever started out of nowhere and I am now at activity level 1 (mostly bedbound).