Abstract:
Tension-type headache (TTH) is very common, with a lifetime prevalence in the general
population ranging in different studies between 30% and 78%. TTH, divided into episodic and chronic types,
introduced in the manual "International Classification of Headache Disorders"(ICHD-I), is of practical
importance. Infrequent episodic headaches (no more than once a month) may not require drug therapy, but, on
the contrary, frequent forms may require expensive treatment.
