What happens to feet if shoes are too narrow?

Can you elaborate on the potential consequences of wearing shoes that are too narrow for one's feet? Are there specific issues that arise from prolonged exposure to ill-fitting footwear, and if so, what are they? Are there any long-term effects that one should be aware of, or is it mostly a matter of discomfort in the short term? Additionally, are there any remedies or preventative measures that can be taken to alleviate the negative effects of wearing narrow shoes?