If you are like most people, you buy footwear when it is on sale. Even if the size is a little too big or a little too small, the shoe is worth buying because you are getting it for a reduced price. But after you wear them a few times, you may notice that your feet hurt after a long day. You may also experience skin irritation, blisters, painful bumps, and other foot problems. Wearing shoes that don’t fit properly can also cause you to have back pain and posture issues. In order to correct these problems, you will have to buy new shoes or find insoles that will give your feet more support.