What should you know about hemiplegic cluster headaches?

Cluster headache typically causes intense pain around one eye or temple, often with tearing, a blocked or runny nostril, facial sweating or restlessness on the same side. Weakness of the face, arm or leg is not a routine cluster-headache feature. It may signal stroke or another neurological problem, so do not assume that a familiar headache explains it. Facial Pain and Pressure or Headache pages can help describe symptoms, but they cannot replace an examination.

If weakness is happening now, note when it began and call emergency services. Do not drive yourself, eat or drink if swallowing is difficult, or take someone else’s medicine. If the weakness has stopped, arrange urgent clinical review because transient neurological symptoms still matter. A GP Consultation can help organise examination and referral. Record the affected side, eye or nose symptoms, speech or vision changes, duration and any previous episodes.

Call emergency services immediately for new weakness, facial drooping, slurred speech, confusion, loss of balance, seizure, fainting or sudden severe headache. Seek urgent help for new vision loss, severe eye pain, repeated vomiting, fever with a stiff neck, or symptoms after a head injury. Keep the person safe while waiting and note the last time they were definitely well.

Could this be a neurological emergency rather than a cluster headache? What tests or specialist review are needed? Which symptoms should make me call emergency services? How should I record future attacks, and which treatments are safe for me?