This is something which we are not focused on in our daily lives. It can produce multiple problems in your spine especially for those who have long sitting hours. Make sure that when you sit in your office chair your wallet is not in your back pocket, (Not only your Wallet – don’t sit with anything in your back pocket).
Your wallet can be a real pain for your back and waist, and it can even lead to shooting pains down your legs. Sitting on a wallet for prolonged hours every day can compress your sciatic nerve which passes beneath the piriformis muscle and leads to piriformis syndrome, lower back pain & self-inflicted sciatica.
The wallet acts as a wedge that forces the pelvis, spine and body out of alignment. Just as you would not sit on a brief case or a rock for an extended period of time, you should not sit on your wallet for an extended period of time. Anyone who drives more than a half hour sitting on a wallet is a candidate for sciatica or lower back pain.
The healthiest option is to move the wallet to your front pocket. If it must be kept in your back pocket, you should remove it before you sit down.