Thank you for the query.
Wound around anus is a very serious condition. It is because in the anus there is a lot of bacteria which constantly contaminate this wound so it can never get healed. And keep the wound clean and separated from the stool is a hard work. And such simple wound can cause sepsis
That is why it is very important to make everything what is possible to separate the stool from this wound. To do that, surgery might be the best and only way. Temporal colostomy
is what the doctors were talking about.
There is also a possibility that something like Flexi-Seal fecal management system might be helpful, so your friend may try it first before deciding for the surgery.
Hope this will help.