I've had my ileostomy since the age of 17. I'm 44 now. Whenever there is a serious issue with a stoma such as a blockage near it, fistula around the site, abscess, or even a prolapse it is best to call your surgeon ASAP to get into see him.
I've been a member and officer of the local ostomy support group where I live and the wound care RN who treats ostomies said it's best to call the surgeon.
Even though each one is different, it's always best to just put a call into them so they can fix it as they know what they are doing.