Your entire mouth and teeth will feel pretty sore when you first get your braces. You may struggle with eating your favorite foods so it is recommended to avoid eating certain foods to relieve your mouth and teeth of additional pressure. Mouthwash and warm salt water help to relieve the soreness in the first few days. If the pain is constant and interferes with your life, then you can take a common pain reliever like aspirin. Wax on the braces can also help to lessen the irritation of the mouth, lips and cheeks until the mouth is accustomed to having braces. Over time, your teeth will loosen up but it is nothing to be alarmed about. The teeth must become loose in order to move into the right position and will become sturdy again when they are in their new spot.