I replied to your other post. You probably need to go to ER.
Normally, surgery in the perianal area, especially removal of skin tags, is avoided in Crohn's patients. There are often complications that can be pretty serious.
The skin tags are actually inflammatory tissue and should not have been removed.
I'm not sure what kind of doctor did the surgery and if your GI was consulted.
If you don't go to ER I would call your GI even tho it is after hours and let them know what's going on.
son now 14 1/2, dx CD age 10; current meds: MTX and omeprazole; previous tmts: pred, 6-MP, Humira, entocort, GMCS, exclusive enteral feeds, pentasa, mesalamine enemas, cipro, flagyl, many topical treatments for perianal disease