Hi, There are different type of headache as below and I will try to explain it in simple terms 1) MIGRAINE - its a head ache which most has some kind of prodrome (factor/symptoms/feeling) which indicates the person that he will be going to have headache soon, mostly people say some kind of aura like lights/ nausea kind of feeling is mostly precedes the onset of headache 2) CLUSTER HEADACHE:- its a headache which is associated with watering in eyes/ nose , pain in eyes , pain associate with some intense light exposure like headache,Sweaty, pale skin (pallor) on the face, one sided headache may be on right or left side. 3) TENSION HEADACHE:- its a headache with band like headache means the hurting area seems like some has tied a band around the head and is very tight. Mostly from the description it seems like a CLUSTER HEADACHE Now following are the cause that can lead to this kind of headache and needs to checked. Headache NORMALLY DO NOT have any UNDERLYING DISEASE (90% case have no issues), BUT in 10% cases headaches may occasionally indicate a serious underlying medical condition, a) brain tumor or b) rupture of a weakened blood vessel (aneurysm) Well the best thing is to attain a piece of mind, and for that ADVICE: Consult NEUROLOGIST (brain doctor) Here is mostly they will do 1) do physical exam 2) will probably ask for MRI SCAN OF BRAIN, 3) If nothing serious mostly 90% of case are with out danger they will give pain medications that is special for the type of cause (e.g- sumatraptin for migranes , so it will be different from normal over the counter medication (available with out prescription) like ibuprofen) so necessary to consult the physician PLEASE do not be scared , there are 90% of headache and have no issue with any kind of brain problems but for the sake of safety and piece of mind MRI / CT Will be need. Hope it helps.