Is it permissible for a woman to break her fast in Ramadan due to a migraine, and how does she make up the days she missed?

A sick person is permitted to break their fast in Ramadan (definition) if fasting causes them severe hardship, based on the Almighty's saying: (And whoever is ill or on a journey - then [he is to fast] a number of other days). However, a minor illness that does not make fasting difficult is not considered an excuse to break the fast. If the headache causes severe hardship, it is permissible to break the fast and make up for it after Ramadan. If it is continuous, making it impossible to make up, then you should feed a poor person for each day.