This is something which we are not focusing in our daily life but can produce multiple problems in spine especially for those who have long sitting hours. Make sure that when you sit in your office chair your wallet should be not in your back pocket (Not only Wallet don’t sit with anything in your back pocket).
Your wallet can be real pain for your back and the waist, and it can even lead to shooting pains down the legs. Sitting on a wallet for prolonged hours every day can compress sciatic nerve which passes beneath piriformis muscle and leads to piriformis syndrome, low back pain & self-inflicted sciatica