To avoid low back & leg pain while driving, remove items such as wallet or keys from your back pocket as they reduce blood circulation & compress nerves.

Sitting on your wallet not only reduces blood circulation, but also puts undue pressure on your back muscles and irritates your sciatic nerve (the nerve which starts at your spine and runs down the back of both legs). Over time this can cause sciatica, which can lead to pain or numbness in the lower leg, ankle or foot.