I was diagnosed with cluster headache over 10 years ago.I used to get them in the fall and they would linger for a couple of weeks and disappear.Currently they have returned about 7 weeks ago and show no signs of letting up.I usually get them about 3 to 5 am.If I take medication when I first feel one coming on,they will be bearable within an hour.I am considering going to a neurologist but am not sure if they could help