Simple:
* The loud noise triggered a migraine for Sarah.
* My doctor prescribed medication to help manage my migraines.
Descriptive:
* The migraine pounded behind her eyes, making it impossible to concentrate.
* She was forced to cancel her plans due to a debilitating migraine.
Figurative:
* The constant chatter was giving her a migraine.
* The news report was a migraine-inducing barrage of bad news.
Emphasizing the impact:
* The migraine left her feeling drained and nauseous.
* She had to take a break from work because the migraine was so intense.
You can choose the sentence that best fits the context and desired level of formality.