What is a cluster headache?
Cluster headaches usually start in children older than 10 years of age, and are more common in adolescent males. Cluster headaches usually occur in a series that may last weeks or months, and this series of headaches may return every year or two. While every child may experience symptoms differently, the following are the most common symptoms of a cluster headache:
- Severe pain on one side of the head, usually behind one eye
- The eye that is affected may have a droopy lid, small pupil, or redness and swelling of the eyelid
- Runny nose or congestion
- Swelling of the forehead
