You probably think having a tooth pulled is not a particularly enjoyable experience. And you no doubt expect to have some discomfort afterward. But that's OK, you say. You can endure it when you need to. But if the pain becomes intense and perhaps even worsen after a few days, it may be a symptom of a condition called dry socket, or alveolar osteitis. Only a very small percentage -- about 2% to 5% of people -- develop dry socket after a tooth extraction. In those who have it, though, dry socket can be uncomfortable. Fortunately, it's easily treatable. The socket is the hole in the bone where the tooth has been removed. After a tooth is pulled, a blood clot forms in the socket to protect the bone and nerves underneath. Sometimes that …