I am 40 and have been doing computer stuff since I was 13. I have always had lower back pain, and moderate carpal-tunnel-ish wrist pain.
The last 2 years however, I've been suffering some insane "migraines", often but not always after an intense work session (even just a few hours sometimes). My neck and head kills, I feel nauseous, sensitive to light and sound, and generally shitty.
I still haven't had a proper diagnosis, but I think it might be "cervicogenic" headaches, basically a headache starting with neck nerves.
Working on neck retraction excercises a few times a day to hopefully help. But as I get older and will likely keep working for a long time, this stuff is so important to sort out.