Orthotics can provide extra cushioning, take pressure off sore spots, and even help control the motion of your feet as you move, says biomechanics expert Tom McPoil, PhD, PT. Not all orthotics do all things, however. Here’s how to find the right one. Support your sport. “When you start an exercise program, especially if you’re a little heavy, some pain in the ball or heel of the foot is common because of the impact,” says Dr. McPoil. To avoid this, try an insert that provides increased cushioning. An example would be Dr. Scholl’s Advantage Sport. “You can also buy inserts that provide motion control, which are designed to improve your alignment and balance,” he says.  Give it a week. Orthotics should provide relief within a week, Dr. McPoil says. If your feet still hurt after that, see your doctor. Get extra padding. “Most dress shoes provide poor shock absorption,” says Dr. McPoil. “Dress shoe orthotics can relieve foot pain and fatigue.” Companies such as Airplus, Dr. Scholl’s, and Profoot make orthotics for dress shoes. Consider getting a custom fit. Research shows that drugstore orthotics can work as well as the pricey custom-made inserts. However, there are conditions, such as leg length differences, where a podiatrist needs to create an insert to fit your specific needs. “They’re more expensive,” says Dr. McPoil. “But they last longer.” More from Prevention: Get Pretty Feet—Naturally