Tailbone Pain

[Zen]

You'll probably want a referral to a physical therapist, look here

[RoadRaven]

Just echoing Zen and Knotted, Summer

Get this checked out - tailbone when you rise doesn't sound familiar to me as bike-specific/bike-related...

[beetle]

I've got this but not as a result of the bike. I had a baby 5 weeks ago and think I've agrevated a previous break in my coxyx. I totally know what you mean when you talking about the pain getting up off a stool. On my bike though I only experience it on the trainer when I'm sitting up, well back, with my hands off the handlebars. Whenever I'm forward it does not hurt. I'm seeing my dr soon and was planning to ask about it then but suspect it will just take time to heal (like it did last time). But it seems like your case might be different as I certainly remember the events that caused the pain to start, could it have been something other than the bike that caused the problem, in your case, like a fall? Regardless I would get it checked by a dr as the others have suggested.

[Thorn]

While the others are probably right and a visit to the doc is in order, but in the meantime, here's a possible simple solution....your saddle is too narrow.

If I ride a saddle that is too narrrow, I get a pain similar to what you describe--just above the tail bone. It is as if someone put in a device and spread everything apart. Standing on the bike becomes almost impossible and I dread intersections. Once I'm up for a while the pain subsides. I discovered this after riding the winter on a good fitting saddle. When I went back to my outdoor bike, the pain started up again. Switched the outdoor bike to the same saddle I was using indoors and voila'--no pain.

Find those threads on measuring the sit bones and then go back and masure your saddle. Do your sit bones have enough room? If so, then look at the shape of the saddle--is it flat across the top or angled to the middle. If the latter, go for the flat.

[Nokomis]

other minor adjustements to consider - if your tail bone is long(?) make sure your cycling shorts don't pull or put pressure on the end. Also look for a saddle w/ a notch in the back so your tail bone isn't pressing in to the saddle when you're seated.

[Geonz]

Also try adjusting height and angle of the seat, perhaps raising it a tad.

MIne's a tad low right now (but, alas, fused so I can't get it loose yet... now, if it's stuck, how come it's gotten lower??? Aargh...) and my butt and knees are what talk to me, and it's only a few hairs too low. It's easier to get into a "sitting too low" situation on the more upright bikes.

[SummerPerk]

Thank you everyone for your thoughtful responses. I have an appointment for an annual this week, and I am going to push for a physical therapy appointment to get this figured out once and for all! I did spend some time pursuing some of the areas you suggested, and I didn't find anything to quite match what's going on, but it was still helpful. I am going to find and read the threads on measuring sitbones--that may have something to do with it, or at least be something I can rule out.