Webdental (tooth) infection, decay, injury, or loss of a tooth are the most common causes of dental pain. Pain may also occur after an extraction (when a tooth is. Webcall your doctor today to discuss the symptoms and arrange for care. If you cannot reach your doctor or you don't have one, seek care today. If it is evening, watch the symptoms. When to see a dentist. Tooth pain may occur because of tooth sensitivity, a mouth injury,.