I'm 40 and I am new with dealing with this type of pain. I have read through all the previous postings that have followed your original topic and question regarding "Leg pain while sleeping".
My hip and leg pain occurred about a month ago (Jan. 2011) for the first time ever. The pain was so severe, I nearly passed out. The pain so far is only effecting my right hip / leg. During this first episode my right hip, buttock, thigh and inner leg from groin to the inner knee was affected. Nothing further down than the knee. My initial thought was that I had a cramp during sleep that went the full course and dissolved on it's own prior to my waking. I took a few aspirin and laid on a heat pad. Eventually after I think a couple hours I fell back asleep and awoke to No Pain or soreness at all.
I had No further issues until about 4 nights later. Once again I woke in the middle of the night this time with slight pain in the hip and thigh and severe pain from groin to inner knee. This time I took some Ibuprofens laid on the heat pad. Sure enough somehow fell back asleep and once again awoke with No Pain symptoms at all.
I contacted a friend of mine who is "not" a doctor but has some medical background. Turns out he had a "Sciatic Nerve" issue a couple years ago and his pain symptoms were very similar. He dealt with various doctors for over 4 months with no positive results. He did some self evalutions and developed a couple stretches that proved helpful.
As a secondary measure, I contacted a different friend and gave him a detailed description. This person went in a different direction and thinks something else other than Sciatica is taking place. He thinks it involves arthritis or tendon/ligament/muscle problems. I actually believe that this response is more accurate. No future pain for about the next 10 nights.
My 3rd flare up was about 10 nights later. This time slight pain in hip, thigh inner leg. Took Ibuprofen no heat pad and again awoke to no pain. Eventhough more time had gone by, I figure I was improving. I was wrong. Last night which was 4 nights later, I feel that I am back to square 1 with pain threshold as if it was the 1st episode over again.
Sorry for such a lengthy response, but during all 4 of these night right leg pain episodes I have tried many if not all of the homestyle remedies. I am guilty of sleeping on my sides and crossing ankles. Pillows between legs only provides a minute or two of comfort. ***** One other thing I have noticed during my last two pain periods is that as the Ibuprofen begins working I will sense a minor click, pop or a release somewhere between my right hip and lowest portion of my back / spine. At this point I'm also looking for any helpful information prior to beginning a future of doctor visits.
Who knows??? It might even be my hip partially dislocating itself? I'm open to any comments, arthritis, sciatica or even a possible partial hip dislocation eventhough no history of accidents or injury to that area.