List of Abbreviations/Definitions
(TGVS); Trigeminal vascular system
(WHO);World Health Organization
(ETTH); episodic tension-type headaches
(CSD); cortical spreading depression
(EEG);electroencephalogram
(HARDSHIP); Headache-Attributed Restriction, Disability, Social Handicap, and Impaired Participation
(HrQoL); health-related quality of life
(TTH); tension-type headache
(NPRS); Numeric Pain Rating Scale
(FGIDs); Functional Gastrointestinal Disorders
(HIT-6); Headache Effect Test
(WhatsApp); what’s application
(UdH); undifferentiated headache