What can be done to prevent the condition?
In general, cluster headaches cannot be prevented. Someone who smokes should quit smoking. It may also be helpful to limit alcohol intake. Treatment of nasal congestion may eliminate some headache triggers.
What are the long-term effects of the condition?
Cluster headaches have no significant long-term effects.
What are the risks to others?
Cluster headaches are not contagious and pose no risk to others.