hello there. it's migraine. migraine headaches are usually unilateral meaning only one side of head pains. patient may experience certain aura like photophobia and nausea etc. migraines usually have a triggering factor. so try to find out the trigerring factor in her like certain types of food etc. during an attack, she must take rest in a calm and dark place along with a good analgesic. in many cases migraine requires sumitriptan prophylaxis. consult a physician or a neurologist to start with it and she should be fine. regards