Root canal or extraction. Inflammation.

I have severe pain in one gum and soreness in that molar. Endodontist did cbct scan and she reviewed it. She didn't send for any reporting. She said she don't see any infection in the tooth but she can see inflammation in that tooth area. Do we need to do root canals if tooth /gum shows inflammation? Severe pain in the gum surrounding that tooth margin. Severe pain in the back side cheek side of tooth and side towards 48. I have more pain in that gum and very painful in the jaw near ear. Using peridex rinse given by dentist for last ten days. No changes in pain.  Peridex rinse didn't help. Deep cleaning done a month ago. Pic taken before SRP. What to do for inflammation seen on the scan? What is the treatment for inflammation in the tooth /gum? My GP did blood work CRP Inflammation markers. CRP came out elevated too. My CRP is 15(Normal range 0-10). GP couldn't find what's the reason for this high CRP. What to do for inflammation in the gum and in tooth? Extraction needed?gum ok?