This clinical report presents the evolution of a possible intraoral traumatic trigeminal autonomic cephalalgia simulating a probable cluster headache.A 50-year-old female patient had severe right-hand side pain for 7 years with autonomic signs and symptoms, such as lacrimation, conjunctival injection, rhinorrhoea, nasal congestion, forehead perspiration, myosis and eyelid edema.The episodes of pain lasted 4 or 5 months with 3-or 4-month remission periods between the painful onsets.The headaches presented an episodic pattern (1 to 3 attacks daily) lasting three to six hours.The patient had used five prosthetic sets continuously (24 h) for 20 years and the current prosthesis was 7 years old.Accidentally, after the alleviation of the maxillary denture due to it rested on a marked irritated incisive papilla the symptoms disappear.The patient has been periodically checked over a 5 year period since, without recurrence of her pain and autonomic symptomatology.The possible pathophysiology is discussed.