Addicted to licking canine tooth, what to do?

Is it sharp?: A sharp canine sometimes induces the tongue to go to the area to "pad" the sharp edge. Ask your dentist to reshape or smooth out the canine if this is the case. Do we have tongue biting during function (eating or chewing or swallowing)? Is your canine erupted in the wrong position (ectopic eruption)? Minor tooth movement with aligner sometimes can help to change the position.

Stop it: If you are licking an otherwise normal canine tooth, the only way to stop it is good old fashioned will power. If there is a problem with the tooth, see your dentist.