Ok so we know that in order to break your fast on Yom Kippur your life needs to be in danger. And we also know that regarding taanis Esther and tzom Gedalia the mechaber says if you get even a slight headache you are OBLIGATED to break your fast. Then there's asara b'teves and shiva asar b'taamuz, which I'm not sure what the halacha is in order to break those fasts. So could someone tell me what state one must be in to break the fast of tisha bav. And also if you can the other two fasts I mentioned before that I have no knowledge about.