My mother Age is 50 . Yesterday evening at 7pm suddenly she got cold fever and shivering i had given paracetamol then the fever goes down. At midnight 2.0 clock her temperature rised again with cold fever again i had given paracetamol then it goes down. Today morning again temperature increased again i had given paracetamol. I had taken her to hospital Doctor advised CBP, CUP, RBS, blood sugar test. All were normal Except RBS count . She has Rbs count as 3.95,hemoglobin as 8.8gms . But Doctor told everything is normal. Might be wiral fever. But Her temperature was not stable. Please Sir tell me what was the problem Why temperature not decreasing? What was the reason? How to decrease it?