You might not think of too much cash as a source of pain, but a bulging wallet can trigger Piriformis Syndrome. Piriformis Syndrome is a condition in which the Piriformis muscles (located in the buttock region) spasms and causes buttock pain. The Piriformis muscle can also irritate the nearby sciatic nerve and cause pain, numbness and tingling along the back of the leg and into the foot.
This condition can affect men who carry their wallet in the back pocket of their trousers. It puts pressure on the Piriformis muscle and can aggravate the sciatic nerve over time. Here are a couple of ways to avoid this problem; 1) carry your existing wallet in a front trouser or jacket pocket, 2) clean out your wallet and determine what you really need on a regular basis, then change pockets, 3) consider a money clip for cash and a card case for "essential plastic" - and keep them in separate pockets.
For the record, we are able to help you with the money clips and card cases, but I would suggest visiting your chiropractor for everything else. If you don't have a chiropractor you trust, I'm happy to make an introduction for you.