Line C in kiatsu for headache treatment is two finger widths to either side of the center of the skull. Learn how to use kiatsu on line C withtips from a kiatsu expert in this free alternative medicine video. Expert: Cliff Derdeyn Bio: Cliff Derdeyn has been involved in Japanese internal and martial arts for 26 years. He has studied sword work under Japanese sword master, Tetsuzan Kuroda. Filmmaker: MAKE | MEDIA