I'm really bad at giving advice for this. I don't work overtime but on average, I work roughly 16 hours a day 7 days a week. From 6 o' clock sharp in the morning to 10' clock at night. I don't keep my energy up. As the week goes on, I get slower and slower. Usually once a week, I take one day where I half that work time, giving me half a day to relax. Sunday, usually. Then I get up fresh on Monday and start over. Foot pain, what kind? All sorts of foot pain. If I had to guess, rough shot in the dark, your feet are hurting because you're on them more than usual. Depending on the floors at your workspace, or your shoes, or what it is that you do, it could be there for a lot of reasons. My terrible advice that won't help at all is this. Just go and do it. No sarcasm here, or anything. That's all I can say because generally that's what I normally do regardless of circumstance.