My sister got a catheter put in cuz its unbearable pain when she has to pee. can i do anything ot help?

Here is...: Some discomfort from catheter is caused by local mucosal irritation and periodic bladder spasm, is expected, and may be helped with: proper positioning of catheter inside the bladder, avoid undue tucking tension of catheter onto the bladder neck, judiciously use pain medication and/or bladder antispasmodic drug, etc. For detail, ask doctor or urologist timely. Best wish...