Toothaches are a common problem that most of us have experienced at some point in our lives. They can be caused by a multitude of factors, such as tooth decay, gum disease, or even an injury to the tooth. While some toothaches are mild and disappear after a few hours or days, others can be severe and persistent, causing discomfort and distress. In some cases, toothaches can be a symptom of a more serious underlying problem, such as a sinus issue.