Investigation on the Chronic Tension-Type Headache from the Persian Medicine Point of View

Tension-type headache (TTH) is the most prevalent primary headache disorder worldwide [1, 2]. According to the International Classification of Headache Disorders (ICHDIII) by the International Headache Society, TTH is classified into four categories: infrequent episodic, frequent episodic, chronic, and probable [3]. The chronic form, i.e., chronic TTH, is one of the types of headache mostly neglected to be treated, influencing directly on the patient’s quality of life, leading to a high economic burden on the society [1]. The typical symptoms of TTH generally include bilateral pressing or tightening with mild to moderate intensity (in terms of quality), with no deterioration in the normal physical activity, and is not associated with nausea or vomiting, but a possibility exists for the photophobia and phonophobia [3]. Chronic TTH, in addition to the above-mentioned symptoms, might persist from hours to days and also might be accompanied by mild nausea, as well as being repetitive. This pain might reduce working efficiency, leading to the absence from work and reducing the routine daily activities of the patient [4].