Please, if you have not done so yet, get in to see who ever is working on your back. I don't know if your back dr. asks you about any bladder, bowel problems or numbness, when you visit with him/her. But the reason that they should be doing this, is for those who have back problems and then get this numbness in the groin (along with the bladder and bowel issues), they could have Cauda Equina or Arachnoiditis, which in its end stages is an emergency. If you find yourself loosing your bladder control, you have 24 hrs. to get into surgery.
I know that all sounds scary, but it is a real problem with back pts. I started with not being able to pee. Just as you said, I'd sit on the toilet for 15 mins. and I had the constipation with that as well. Then I saw a Urologist and he tested my bladder to find out if it was my kidneys or if the problem was due to nerve damage, which meant either Cauda Equina or Arachnoiditis. (At least, that is what my Dr. told me.) The Urologist tried several meds. with me and finally found
Flomax, which is actually normally used for men. But he said that it often works with women too. The problem was if I took 1, I still could not get myself to go enough. There were a few days that I went 24 hrs. or more, without peeing. They upped the
Flomax to 2 pills and I was feeling that urgency pain of having to go, every hr. but only a small amount would actually come out. So, I am now having to cath. myself 3 times a day and use the
flomax. But, he said we had to do all of this to find a way of getting me to pee at least 4 times a day (and 5 times was preferable). If not, the bladder will cont. to fill up and will stretch and then will overflow and then a person will loose control of their bladder and will have that 24 hrs. to get into the hospital for surgery.
I now have that numbness, not to the extent that you have. When I wipe, I can't feel the tissue, but I don't have the complete numbness that you described. Anyway, you do need to get to a Urologist at some point soon, to get a med. to will get you going, or you will end up having to cath. yourself. The sooner you get this taken care of, the less likely you will have to do that or loose control of your bladder. If the Urologist dx. you with nerve damage that is causing this problem, then you need to see a Neuroligist to have an EMG done.
I am sorry if this sounds scary, but it is an important thing to know for those who have back problems. You can search the dx. of Cauda Eqina Syndrome and Arachnoiditis. Then get to a Dr. for some meds.
Please let us know how things turn out.
Lorie