Dry sockets continue to be the most common problem people experience following dental surgery. They arise due to premature loss of a blood clot in the empty tooth socket. This seems to occur with greater frequency in people who smoke or are taking birth control pills. While both jaws can be affected, they usually occur in the lower jaw on the third to fifth day. They cause a deep, dull, continuous aching on the affected side(s). Patients may first notice the pain starting in the ear radiating down towards the chin.