Dentists highly suggest that you wait for at least 72 hours after the oral procedure. When your tooth is extracted, the extraction site forms blood clots. This clot must remain intact to ensure the wound is healing correctly. Suppose you notice the clots are moving quickly. In that case, you might experience a dry socket, which is a painful experience, and you don't want it. Most importantly, once you suck on the cigarette, it pulls blood clots and makes dry sockets.