Cluster headache behind one eye: what to know

The pain is usually concentrated around one eye, the temple, or the forehead on one side. During an attack, the affected eye can water, redden, or feel swollen, while the eyelid may droop and the nearby nostril may run or block. Many people cannot stay still because the pain is so intense. Repeated attacks may follow a similar daily timing or occur in bouts separated by pain-free periods. This pattern supports assessment but does not replace an examination.

Keep an attack diary with the side, start time, duration, sleep disruption, alcohol exposure, and eye or nose symptoms. Bring it to your GP Consultation, along with a list of medicines, supplements, and past headache diagnoses. A clinician can check the eyes and neurological system and decide whether specialist review or targeted treatment is needed. Avoid driving if your vision is affected or the pain makes you unsafe.

Call emergency services for a thunderclap headache, new paralysis, trouble speaking, confusion, collapse, seizure, or fever with neck stiffness. A red, painful eye with reduced vision, vomiting, or halos needs urgent eye care. Seek prompt medical review if this is your first severe attack, the pattern changes suddenly, or the eyelid droop remains after the pain settles. Otherwise, arrange a GP Consultation for recurring attacks.

Ask how the attack pattern compares with other headaches, whether you need an eye examination, what to do at the first symptom, how prevention is monitored, and when to use emergency services.