My grandfather is 86 years old and has been paralyzed in bed for half a year. Now I'm using an anti-bedsore pad, which leads to serious fecal incontinence. He's got shit in his anus all the time. Maybe he took medicine these days. ... It's not the same thing as anal fistula You misunderstood the meaning of anal fistula.

This is fecal incontinence and needs to be managed through incontinence. Incontinence is a very common phenomenon.

You can use a stool bag or a fake anus.

If he is conscious, he can practice anal contraction (the action of restraining defecation)