Hello,
It is not possible to make a precise diagnosis online without being able to examine the patient.
Furthermore, some diagnoses like
migraine by definition are made only after a number of episodes have occurred, can't be made by 1-2 episodes alone.
What matters is to decide whether there are indicators that the headache is related to a brain lesion.
Some so-called "red flags "would be acute onset and very severe persisting headache,
vomiting, increased sensitivity to light and sound, changes in behavior, confusion, visual changes,
fever, weakness in the
limbs, seizures etc. From your account, he doesn't seem to manifest such symptoms.
The one other heartening factor is that this is not the first episode and there was a headache-free period between the episodes.
That makes the possibility of progressing brain lesions like tumors, infections, inflammation unlikely, the migraine would be a possible diagnosis.
So if he is sleeping and feels well upon waking up I wouldn't take him in the ER. If the pain persists upon waking up then I would have him seen and checked for neurological signs you might not have noticed.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Olsi Taka, Neurologist