I had the worst experience Fri night wondering if anyone has had this happen. Friday night was exhausted from cleaning my house. I sat down to take a break and I started freezing to the point that I tensed up whole body for about an hour...had upset stomach, and started to get HA and my head got so hot I new I was getting a fever. O2 didn't work, took rizatriptan and it was the worst hour I actually thought I would have my husband call an ambulance. He got me wet wash cloths and helped me through it....I ended up with a low grade fever 101.3 and so much pressure in my head after that I woke up in morning and said well I'm still alive! My fever lasted rest of day and head pressure also Sunday almost normal. Could it have done damage?? My family doctor will not get this and I don't have a neurologist right now. Just curious if anyone else has experienced this. Thoughts.. It was worse than any ha I ever had since these started over 10 years ago. Thanks

I'd be thinking along the same lines as Maz with the fever bumping your temperature which kicked off the CH. But that is very much a guess as to what the mechanism could be.

If it happens again, i.e. it's a change from your usual CH experience then I'd look to see your doctor to investigate further. Or if you're still concerned, see one anyway.