Hi, !
A flare and an infection may have similarities, so it's important to check in with your doctor, just to be safe. Also, an infection CAN trigger a flare, so that complicates things. Here's some good basic information on flares that you might find helpful -- https://rheumatoidarthritis.net/what-is-ra/ra-flare. And, please, if you are thinking you might have an infection of any kind, do speak with your doctor, if you haven't already done so.
Best, Erin, Team Member.