don't know if this helps.
Seriously, and don't EVER call me that, part of our Lymphatic system runs through this area, and there are Lymph Nodes here. These Nodes respond in times of infection...that is what you are feeling. WHen I FIRST discovered I had Lyme, I thought I had a hernia...but it was not quite where a hernia would be...then the sweats, shakes, and unreal headache, plus delirium...nice stuff.
Do not worry...this shows your body is responding in a normal way to the Lyme and whatever else you may have. This too shall pass...
Peace, love and wellness
JRW
It sounds as though I get this "just to the left/right of the groin" pain, but I could better describe my pain in Barbie Doll anatomy.
(Hold on to that thought, JRW, I'm not quite finished with my comment . . .)
Anyway, as I was saying, if I were a Barbie Doll, with a missing leg, the pain I feel would be where that empty socket now is (where the leg/thigh would snap into, if it weren't missing).
It feels as though I have a large rubber band (in that socket) that is twisted and which binds and catches upon any movement (when it is acting up) as when going from a sitting position to a standing position, at which time the pain is excruciating.
Does this sound like what you are referring to?
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Tabby
Hmm. No, I don't get that pain under the buttocks.
What I do know is that since I became ill with this stuff, I have gotten pains in places that I never knew existed. 
Tabby
Let's see, I will have to see you all to make an accurate hunch...as I am NOT a doctor, I can not diagnose...HOWEVER, I CAN PLAY DOCTOR, OK? Your house or mine. Be quiet, my parents will hear you come in....
Delightful regressions# 102
The problems you have are: Lymph Glands
and, possibly what I get in addition...tendonitis...caused by the Lyme bacteria. Often my hip joint ( a restaurant with good music) hurts so bad that I can't walk...then it goes away...very strange.
Rainbow, let me see...ok, ah ha, right THERE is it? Your hip joint could also be inflamed, and this can be felt "under" the buttocks. I have an excellant technique in massage that is great for this. Be right there!
Have you, seriously, tried aspirin for a few days? Also, SAM-e has just been given a tentative seal of approval as a good anti-inflamatory and mood elevator...
My office hours are whenever you get here.
Bring wine. and food...Thank you lord...
Hey, seriously, this is all Lyme stuff...don't worry...!
Peace, love and wellness
JRW
YOU NEVER KNEW THESE PLACES EXISTED??? HA!!!
Perhaps you could have told THAT to your boufriends, but PLEASE, we know better don't we??? Hmmmm?
Yes, of course we do. Now, where is everyone? I came home and NO ONE showed up yet. I can only wait so long...couple of months maybe....
Rainbow...I thought your pain was OUTSIDE the Fabian...(Sic) ? If not, and it is where PlanoLymie's was, by all means go to Gyno...I gonna go to my gyno...he'll tell me yes or no...goin' to my gyno...his hands are sooo cold though...gonna heat them up first...have a drink...quench my thirst..
goin to my gyno..you go girl...ouch...!!
Take it to the bridge....Hey!!....
Excuse me...just heard some old great music:
SHOTGUN by Junior Walker and the All Stars
(1965)...made me move, made me grove...get down!
Now. if your problem is not "inside"...and it feels like rubber bands...that is ligaments that go from your thigh over the pubic/hip bone...sometimes it can get irritated and inflamed...the same for the hip joint. Which, of course is the best kind...
Peace, love and wellness
Inside Jokester
I may not know about some places, but I do know that my pubic bone and my hip bone are two different things.
Maybe not in your world . . . or maybe you've gotten into your kitties catnip one time too many. 
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Tabby
I just noticed that we're both Californians 
Now, I too know the difference between a hip bone...connected to da thigh bone.the thigh bone connected to da knee bone...and dem all connected to the HAMBONE!
Is your pain in the crease where the thigh meets the pubic area, or behind your rear, under the gluteus?
If in front, along the line that forms a V as seen from the front (this is hard..no, not that, the subject...pant, pant) then you have either an enlarged lymph node...exactly what I had...or, tendonitis or inflammed ligaments and such...which Lyme causes.
If one follows this area to the rear, below the "cheeks," the hip socket is palpable...this too gets inflamed from Lyme and pain can radiate (referred pain) from this area. I just need to do an exam...nurse, please get dressed and set these people up with an appointment.
Woops, is this YOURS? No, I stopped wearing Panty Hose...yeast...!!!!
LUCKY PEOPLE TO LIVE IN CALIFORNIA...LAND OF EXPLODING TOILETS!
Peace, love and wellness
JRW
How Tabbytamer explained the process is exactly what is happening to me upon sitting or rising. Although I can just be standing or sitting and it will hit. Sometimes it feels like my whole insides are coming out.
Now, not to get to graphic here. Actually I have no choice as I am dying to know if anyone else is experiencing this! I feel like I am nuts. Seems to be a pattern that during herx when I get the burning, itchy rash, I get it also in my vagina. It's not painful but much disturbing. I am positive I have no kidney or bladder infection or yeast for that matter.
I agree, I am finding weird pains and sensations with this thing that I never thought would be there.
Someone, PLEASE, take this dam- ELEPHANT OFF MY CHEST!
This is just TOOOOOOO strange for me.
Clarice
Did you two contract Lyme here in California?
I am wondering if we have a similar strain? Or maybe it just depends on how long the body has been fighting this disease and these are all symptoms of chronic Lyme?
I've get that elephant pressure on my chest too. That's one of the more recent symtoms since I started abx.
Who knows...you could have a sub-clinical case of fungus, or a bacterial infection. One does NOT have to have a discharge to have a fungus/yeast.
This is not something to fool around with.
The other symptoms could be caused by an infection here!
Lyme does some very strange things...is this Lyme related or not??? Get some smears taked...do the right thing and report back ASAP...I am waiting.
Good luck!
Peace. love and wellness
JRW
I also have had the kind of thing you describe and I would use almost identical terms to describe it (if that's where it is, name it!)-- that area in the leg socket by the groin, an almost burning pain stretched up to the buttocks. Mine was an inflamed tendon: my LD included a lot of tendonitis, and that wasn't even the worst.
I have the western strain too, btw (picked up in WA state though).
Did a little reading a while back about the different strains, and I think I remember (I still have sort of a Lyme brain) that one of the ways the western strain differs is that it is less likely than eastern strains to go arthritic, more likely to affect tendons and inner organs, and to go neuro more quickly.
I have also had swollen lymph nodes in my groin, and had a yeast infected gland that was boil sized, and the kind of discomfort you are describing sure sounds more like the tendonitis things to me.
Mine is clearing up nicely after a few months on doxy/flagyl/plaquenil plus herbs. I am off the flagyl for now, as I am taking Cipro for bartonella and you can't take the two together. Cipro has potential for weakening tendons, so I am theoretically taking it easy while I am on it. Wish I could remember that! I think I've been pushing my luck...
Whatever your problem turns out to be, hope it resolves soon.
Hugs,
Dayle Ann
At the time I didn't know I had Lyme. I couldn't really tell where the discomfort was coming from, sometimes it felt like it was in the muscles or tendons, other times it felt more like it was in the organs or in the hip joint. I went to my gynecologist and was checked for vaginal infection or UTI but nothing turned up in the tests.
I then went to a physical therapist who thought it may be tendonitis. I had a few therapy treatments which helped some. Ice packs seemed to help a little (very attractive look under jeans). I think mine was centered in the connective tissue and it eventually went away, only to be replaced by other bizarre symptoms. Never a dull moment!
Dayle Ann, good to hear from you! So happy to hear you've made such tremendous progress and are able to go out and enjoy the world again. Keep up the good work!
No? OK, try this on...you have intercostal muscles (between the ribs) that can get inflamed, along with the connective tissue.
Another possibility is anxiety...and stress.
DOes a nice hot bath (AFTER A CLEANSING SHOWER) make this go away?
Message?
Valium?
A fifth of Scotch?
This will all be history some day...do not worry.
Peace, love and wellness
JRW
since that post i've heard from another person who has it.
wow. 3 yrs with this pain and now i know i am definitely not the only one. even my LLMD had never heard of it.....6 mos ago.
we should add it to the symptom list!!!!
Michelle
Did a little reading a while back about the different strains, and I think I remember (I still have sort of a Lyme brain) that one of the ways the western strain differs is that it is less likely than eastern strains to go arthritic, more likely to affect tendons and inner organs, and to go neuro more quickly.
Do you have any idea where you read above information - as I have only had Lyme since early summer and my worst problem is pain - (I think it's nerve pain) - and would like to read something more about the different strains - if you can remember - would much appreciate.
Kindest
sarav