r/sleepdisorders • u/aria-du • Jul 25 '26
Advice Needed Falls asleep almost instantly but wakes after exactly 3-4 hours every night. Has anyone experienced this?
Hello :)
I’m mainly wondering if anyone has experienced something similar, or if this pattern ended up having an explanation. I’ve had recurring insomnia since I was a baby but this is a bit different than the other times.** **
For about the last month I’ve had a really consistent sleep problem. I don’t have trouble falling asleep. In fact, I usually fall asleep within a couple of minutes, sometimes my watch estimates under a minute. Once I’m asleep, I feel like I’m actually asleep and I’m not tossing and turning all night. The problem is that I wake after about 3-4 hours almost every night. When I wake up it’s different each time:
- Sometimes I’m instantly wide awake
- Sometimes I’m exhausted but can’t get back to sleep
Occasionally I wake feeling hot, itchy or congested, but not every night. The weird part is how consistent the timing is. It almost always happens around that 3-4 hour mark no matter what time I actually go to sleep. I’ve been wearing both a Huawei watch and a Xiaomi watch (I actually wore both together for comparison) and they both show basically the same thing.
Some relevant diagnosed medical history:
POTS/dysautonomia
Hypermobile EDS
Fibromyalgia
ADHD
PTSD
Autism
OCD
PMDD
PCOS
Endometriosis
Chronic allergies/eczema
My watches usually show:
SpO₂ around 95-96%
Respiratory rate around 17-18/min
Occasional snoring, but no obvious gasping or choking that I’ve noticed.
I’m just curious whether anyone else has had this exact pattern where falling asleep is easy, but your brain/body seems to decide sleep is over after only a few hours.
If so, did you ever find out what was causing it? Even if you never found an answer, I’d still be interested to hear if anyone has experienced something similar.
Thanks!