There are many possible reasons why your ear might be ringing. One common reason is exposure to loud noise, which can damage the delicate hair cells in your ear that are responsible for transmitting sound to your brain. Other possible causes of ringing in the ears include ear infections, certain medications, and certain medical conditions, such as Meniere's disease and high blood pressure. In some cases, the cause of ringing in the ears is not known. If your ear continues to ring, it is a good idea to see a doctor to determine the cause and get appropriate treatment.