Why do we need carbs? Why do we need to eat carbs? Importance of carbohydrates. Energy foods
By Mayo Clinic Staff. Thunderclap headaches live up to their name, grabbing your attention like a clap of thunder. The pain of these sudden, severe headaches peaks within 60 seconds and can start fading after an hour. Some thunderclap headaches, however, can last for more than a week. Thunderclap headaches are often a warning sign of potentially life-threatening conditions, usually linked to bleeding in and around the brain. That's why it's so important to seek emergency medical attention if you experience a thunderclap headache.
Episodic cluster headaches are defined as those that occur in periods (clusters) lasting from 7 days to 1 year. Clusters are separated by headache-free intervals lasting at least 2 weeks. Clusters usually last 2 weeks to 3 months. Chronic cluster headaches are defined as those that occur for more than 1 year without remission (intervals in which headaches do not occur) or with remissions lasting less than 2 weeks.