leg gives way for no reason causes sharp pain in groin area, what is this

Quite possible it's Sciatica. I have had the same pain too, ever since I delivered my second child, tho having children isn't a requirement for the condition. The pain can shoot down from your back, your hip, or straight into your leg. I was so bad at one point that I would colapse in the middle of a parking lot or walking along in a store. Sitting didn't help either. There isn't a lot you can do about it, if thats the case. Pain meds, like anti-inflamatory's NSAIDS( Advil) and warm compress will help ease the pain as well. Goodluck.

My leg gives out a little when I walk in the upper right thigh and I did it on the first day of dance tryouts . Do you think I could still go to the rest of the tryouts without making it worse?

Hi i know this reply is a bit late after your posts, but i have important info, if it is a weakness from an injury like my problem there is only one thing to do and that is strengthening the muscles. I was recommended yoga and now if i do yoga regularly the pain goes away, if i dont do yoga for around ten days my right leg starts to weaken from the top of the thigh, i will go to stand up and i have to stay still for a moment and carefully place my foot on the floor and wait before moving otherwise i have a sharp weird pain where the muscle meets the hip. I was diagnosed with a nudged hip bone and the muscles surrounding it have been stretched and damaged, but i will never know for sure without an xray. Since doing Yoga i do not care really as every time i do it i can feel the strength and stability returning to my leg! I swear by it.
I do hot yoga, but any yoga is good as long as its powerful - eg power flow, barkham method. Its the warrior and chair poses that do the best strengthening so you can even do it at home and youtube a class on the computer!

Oh I have this too,

Pain in the crease at top of my left leg. Right in the hip joint. LEg gives way and I cant put it to the floor or put pressure on it for the pain. Cant straighten it either. Like other posters have limped around and "managed"
Dr says muscle problems. Take brufen and that was it. I had to live with it!

Susan
I have torn cartilage on both sides of my right knee. The doctor drained the knee and removed 55ML of uric acid. It was checked out and found to be ok.
I'm having problems now with a sharp pain across my instep or top of my foot which causes my r leg ot give out and causes me ro almost fall.
What could causes this,

I have the problem. Sharp pain in and around iside of thigh area. My leg however gives out every step, I have been using a cane. This is the first time this particular thing has happened. I have lower back problems as well because of a short leg due to injury, which has lead to severe sciatica for some years now. I had orthotics made with a lift in the left leg which has greatly reduced bouts of sciatica. I am wondwering if this is all related somehow.

I'm having the same problem and I would like to know what to do about it. At times I can't walk. I have sharp pains in the upper left thigh between the inner thigh and front thigh, very high, possible groin. When I am sitting, it hurts to lift my leg up using my thigh muscles. These sharp pains come and go. I can be walking fine and then my leg gives out because of the sharp pain. It seems like it is worse when I have been sleeping or sitting and then get up and try to walk. Could this be caused by a back being not aligned properly. I have lower back problems (degenerative disc disease) and I have heel spurs. Could they all be related?