Dry socket is one of the potential complications after an extraction.
After an extraction, blood clot will be formed in the socket at the extraction site to stop bleeding and provide framework for new tissues to develop. In dry socket, the blood clot is dislodged or dissolves, leaving the bone exposed to bacteria in saliva, air, food and fluid. The bone becomes infected and painful for a few days. The pain can be severe, throbbing and radiating, sometimes to the ear. Furthermore, the person will have bad breath and unpleasant smell and taste in the mouth.
To relieve the pain, a pain-killer can be taken. However, it is advisable to see your dentist again so that he can remove any food debris, clean the socket with antiseptics and fill it with medicated dressing to support healing process. He may prescribe you with antibiotics, if needed.
Smoking may increase the risk of having dry socket, therefore please refrain from smoking for at least a few days after an extraction.