Arch supports can help to relieve plantar fasciitis pain by preventing overpronation and reducing tension on the plantar ligament. Overpronation occurs when your foot rolls to the inside when you walk, causing your arch to flatten out. You’ll know you’re an overpronator if your soles tend to wear out on the inside. The right arch supports worn inside your shoes can keep your feet from flattening, thus relieving pain. However, not all arch supports are the same, just like all feet aren’t the same. Dr. Marciano of texasfootdoctor.org recommends purchasing “good arch support or shoes that can accommodate arch supports” based on your arch type.