Cluster headaches - Prevention 

Alcohol

Alcohol may trigger attacks of cluster headaches during the period that the headaches occur. Avoiding drinking alcohol during these periods will reduce the frequency of headaches. During headache-free periods, alcohol doesn't appear to trigger attacks.

Nitroglycerin

Inhaled nitroglycerin – a medication that causes the blood vessels to enlarge – can cause attacks of cluster headaches. It's recommended that you avoid this at all times.

Temperature

An extreme increase in temperature can trigger a cluster headache, so avoid exercising in hot weather and anything else that may make your body temperature suddenly increase.