I woke up at 3 am this morning due to massive pain in my neck. Didn't sleep much since then despite taking pain killers and doing some stretches. Haven't had such pain for a while.
I remember I used to have sore neck and shoulders years ago almost weekly. Sitting long days in front of the screen can be quite straining to that area of the body.
After a lot of effort in getting in shape, paying attention to my work ergonomics and forming a habit of regular stretching the pain was only a memory. Mostly.
Every now and then I still end up spending extended amounts of time in bad postures. Still, I can't think of that happening this time. Maybe it's just another sign of age. My body's tolerance to bad postures has started to decrease. I might need to start paying even more attention to keeping up with my habits of keeping good posture and stretch even more.