My son had a fever yesterday and was diagnosed with herpetic pharyngitis. After two doses of Mefenamic acid, the fever went down but then spiked again. The doctor at the hospital said it was this illness, that the blisters in his throat had burst. He prescribed some anti-inflammatory medicine and medicine for the blisters, and then said that fever was normal. But Yongqi has continued to have a fever since coming home—39.6, 39.8 degrees. I was afraid, so I gave him another dose of Mefenamic acid, but when the medicine wore off, his temperature went up again. Has anyone had a similar experience? What should I do? Is 40 degrees really okay? Right now, I can only use physical cooling methods or give him Mefenamic acid, but I can't give him too much Mefenamic acid.

By the way, Yongqi is 8 months old.