Brief Answer:
Migraine likely

Detailed Answer:
Hello,

Your son has likely a migraine headache. Please remember that there are stock triggers that precipitate the migraine attack. Also the migraine attacks are generally grouped. If you stop one episode successfully it will be a migraine free period for long time.

The precipitators are these, you should educate your son:
1) Sleeplessness - Sleep early on time and rise early on time
2) Dehydration - During summers this can be a good reason, have at least a litre of water as soon as he gets up in the morning.
3) Skipping meals - Try to maintain meal time so that the blood sugar levels do not drop down
4) Too much fluctuation in weather temperature is considered a factor

To help reduce the attacks
a) Let him have a good walk / jog every day, this releases pain inhibiting substances in the brain
b) Most migranuers get to know the attack few minutes in advance, let him take a pain killer immediately to stop the attack. Let him carry Over the counter Motrin/Advil/Naproxen all the time.

Hope this info is bit useful to stop attacks. Other things let your doctor investigate and let me know the results as well.

---