There are a variety of medications that can stop a migraine
after it has started, as well as help to prevent migraines from occurring in the first place.
See the doctor to find what is best for you. Also, it is important to keep a headache diary
to determine when you get headaches and possible triggers (chocolate, caffeine
, etc). That way you can avoid these triggers in the future.
Answer assisted by Justin Fuehrer, Medical Student