Tooth pain usually occurs for two reasons: decay and infection. Tooth decay is the more common cause of tooth pain, often going undetected due to being painless. Tooth decay occurs when sugars from food persist on the tooth surface and promotes acid production that breaks down teeth. The other cause of tooth pain is an infection caused by bacteria in plaque that multiplies in the mouth to invade a damaged tooth or untreated cavity, causing swelling and redness around sore or receding gums. Fortunately, there are some things you can do to cope with tooth pain and other oral ailments. Here are 7 tips for someone that is dealing with tooth pain.