Are their physical or emotional stress involved with photography?

Finding enough work to pay the bills and meeting deadlines come immediately to mind. Demanding clients who think they know more than you do are another. Physically, you spend a lot of time up on ladders, down on your belly, schlepping equipment (unless you can afford an assistant), setting up lighting, and sometimes fording streams, climbing mountains and slapping insects. It's a great career and a lot of fun, but it definitely has its stresses.