I started lucid dreaming many years ago but for one reason or another stopped trying to have them - they did continue without me trying and very infrequently. Then I went through a long period of time when I didn't have any at all.
I started having them again about 2 years ago (without trying) but with the most bizarre and scary new 'feature' - as soon as become lucid (or soon after) and tred to assert any kind of control or perform a concious action, I start to get a headache. The headache is almost a 'throbbing' and each 'throb' is almost like simultaneous with my pulse and each one gets worse and worse and worse, and eventually I wake up.
After I've woken up, the headaches continue to get worse and worse, the pain is quite literally unbearable.
Eventually, the pain reaches a 'high point' and it feels like my head is going to explode, but then with each pulse, it slowly subsides. I've had this with my last 3 or 4 LDs.
I actually recently went to the hospital emergency room because it was that bad and I think I had a panic attack with it (because I didn't know what was going on) so that made things worse and I felt dizzy / numb too! Not fun

OK so anyway, I got my blood pressure and chest and temperature all checked out and everything was 'perfect' - and they sent me home.
I'm actually scared to go to sleep now.
Has anyone ever experienced anything like this before with LD'ing? (Note, I do get these headaches sometimes when I'm awake and have in the past been checked out at the hospital) however, they now always occur with my LD's.
Any thoughts would be much appreciated! Thanks
