Update...I'm posting in case this might be of interest to anyone with a stitch abscess from a foreign body Ireaction.
just had surgery to irrigate and debride a small area where the sinus tract opened up. He also re-stitched it with nylon.
This has been super annoying, since I have had to be off of psoriatic arthritis meds for 2 months and I'm experiencing a flare.
Hopefully I can gain back lost ground when this heals up and I can get back on my meds.
My Ortho said he only very rarely sees this happen. I can usually be counted on to be the oddball case!