Bruxism is an abnormal grinding or gnashing of teeth which can happen while you are awake or asleep. It may play a role in temporomandibular disorders (TMD), although the exact link between the two is unknown.
A number of studies show a strong link between bruxism and TMD. The relation between the two is complex and it may be that bruxism leads to TMD symptoms or that both occur simultaneously.
Many patients are unaware that they clench or grind, particularly if they have sleep bruxism. The following symptoms may be indicative of bruxism :