Debate: differences and similarities between tension-type headache and migraine.

"Declarations Ethics approval and consent to participateNot applicable. Competing interestsDilara Onan, Samaira Younis, William David Wellsgatnik, Fatemeh Farham, Saulius Andruškevičius, Ana Abashidze, Asel Jusupova, Yuriy Romanenko, Oxana Grosu, Meerimgul Zamirbekovna Moldokulova, Ulkar Mursalova and Saida Saidkhodjaeva declare no conflict of interest.Sait Ashina received honoraria for consulting from Allergan/AbbVie, Amgen, Biohaven Pharmaceuticals, Eli Lilly and Company, Impel NeuroPharma, Linpharma, Lundbeck, Novartis, Satsuma, Supernus, Teva, Theranica, Percept. Sait Ashina is an associate editor for Neurology Reviews, Frontiers in Neurology, and BMC Neurology, serves on the advisory board for the Journal of Headache and Pain, and is a member of the Education Committee of the International Headache Society. Paolo Martelletti is the Editor in Chief of The Journal of Headache and Pain and Editor-in-Chief of SN Comprehensive Clinical Medicine. Competing interests Dilara Onan, Samaira Younis, William David Wellsgatnik, Fatemeh Farham, Saulius Andruškevičius, Ana Abashidze, Asel Jusupova, Yuriy Romanenko, Oxana Grosu, Meerimgul Zamirbekovna Moldokulova, Ulkar Mursalova and Saida Saidkhodjaeva declare no conflict of interest. Sait Ashina received honoraria for consulting from Allergan/AbbVie, Amgen, Biohaven Pharmaceuticals, Eli Lilly and Company, Impel NeuroPharma, Linpharma, Lundbeck, Novartis, Satsuma, Supernus, Teva, Theranica, Percept. Sait Ashina is an associate editor for Neurology Reviews, Frontiers in Neurology, and BMC Neurology, serves on the advisory board for the Journal of Headache and Pain, and is a member of the Education Committee of the International Headache Society. Paolo Martelletti is the Editor in Chief of The Journal of Headache and Pain and Editor-in-Chief of SN Comprehensive Clinical Medicine."

"Funding The publication fee for the present article was granted by a full waiver."