Inflammation
noun
When you have flame symptoms that's when you feel like you're filled with fire, which is inflammation.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
筋肉の炎症には、ノンステロイドの痛み止めを処方しておきますね。
I’m going to prescribe some non-steroidal pain relievers for your muscle inflammation.