I have been experiencing some of the same symptoms as Benign Rolandic Epilepsy.  I think thats what it was called.  Can adults have this? It says it usually only appears in children.  For the past year to year and a half, I keep waking up with a severe pain in my tongue.  My tongue will also be stiff and hard to move.  I nearly always bite my tongue as well and create deep words along one of both sides.  It only lasts for a brief time then its over.  Recently I have discovered i dont have to be completely asleep now do I have to bite my tongue.  The pain has also seemed to move into the back of my throat a little and I sometimes have difficulty speaking in the morning because my tongue is stiff feeling.  I have also started finding that I am drooling afterwards and sometimes around my mouth and lower cheek will be tingly. It usually is on my left side but can happen on the right. I cant figure out what is going on except maybe an epileptic seizure but it only seems to happen when Im asleep.     Kim matthews
Hello, Your symptoms looks like a seizure only, and it can cause biting of tongue along with stiffness and pain. As the symptoms are recurring frequently, therefore you should consult a Euro physician and get evaluated. You can be advised an MRI Scan to rule out the exact cause of the symptoms. Further, investigations and management can be planned according. You should take care of it as it can cause fatal outcomes if treatment is not done soon, so you should consult a Euro physician soon. Hope I have answered your query. Let me know if I can assist you further.