Rectal discharge is extremely common. Even after the rectum or colon has been disconnected from the rest of the bowel, it still produces mucus. If there is no blood, there is probably nothing to worry about
The pain from a major abdominal operation takes a few months to completely go: there is a lot of healing to do and it's a slow process.
Does your partner have a stoma nurse at the hospital? It might help him to speak to somebody who is experienced in ostomy issues. Otherwise, it's just a matter of time. He has been through a lot, with another operation still to come (if the stoma is temporary). He should eventually get back to his old self, but we're talking several months rather than several weeks.
Dx Crohn's in June 2000. (Yay )
Tried: 5-ASAs, azathioprine, 6MP, Remicade, methotrexate, Humira, diets.
1st surgery 20/2/13 - subtotal colectomy with end ileostomy.
2nd surgery 10/7/15 - ileorectal anastomosis. Stoma reversed and ileum connected to the rectum.
Current status: Chronic flare. Do I have any other kind?
Current meds: 50mg 6MP; Entyvio (started 3/11/16)