Only can give you my experience. I was to have knee replacement surgery a mont ago. My UC flared up three days before with bloody diarrhea. I know I would have to take blood thinners after surgery so I called and told surgeon.
He will not do the surgery until I can get into remission with NO bleeding. Makes sense because of my risk for blood clots. Probably depends on type of surgery you are having too.
I believe the stress was the reason the flareup was worse and bleeding started. Hoping I can get it under control soon. I feel the gastro doctor and orthopedic surgeon will have to agree before I can have the surgery safely. I am taking Xanax to calm my anxiety. Other information is below.
Elaine