Ask HN: Does coding give you brain fog?

Do you ever suffer from brain fog after a day of intense thinking/coding ?

Some days after intense working I leave the office spaced out, to the point I wouldn't drive. Thankfully I hop on the train.

I also find the whole prolonged screen exposure and posture just leaves me with a headache and neck ache.

I really notice how much better I feel after maybe 3 days off work..