Aside from known injuries to your lower back, you may also be standing for long periods in incorrect footwear. You are likely bent over for a good part of the day and pulling and pushing to get things done.
You work physically for long periods of time and often in cramped positions. This can cause extreme forces through your neck and upper back.
Knee and Foot problems are often linked together. You may not have any pain in your foot, but when the bones are not moving well, it affects how you walk and this affects your knees.
Knee problems can be caused by traumatic incidents, but knee and foot pain is often made worse by: sitting still for too long; climbing stairs or ladders; or walking or standing in incorrect footwear.
You may have had a specific injury such as pulling a load or getting an unexpected jolt. You perform repetitive actions such as pulling on a bar to get in and out of a vehicle or using your tools.