Hey... That is where i get my worst pain.... from my xrays it shows that is also where the damage and fusing has occured.... in particular.. and what i reckon is responsible for the stabbing spasms.. is there are ligaments in there that are all calcified.... like rope coated in crushed glass..... so yeah get some xrays..... are you on meds? when this spot goes for me nothing stops it so it means horizontal and hot pack for a day or two and then very careful til it settles down. Keeping the stretches up helps i guess.... rob