Recurring headaches, including migraines, can be triggered by various factors. These may include stress, lack of sleep, hormonal changes (particularly in women), certain foods and drinks, weather changes, and medications.
Migraines, a common recurring headache, are believed to be due to abnormal brain activity temporarily affecting nerve signals, chemicals, and blood vessels in the brain.
Tension-type headaches, another common form, are often related to stress, muscle strain, or anxiety. Cluster headaches, which are less common but extremely painful, may be linked to a biological clock malfunction in the brain, as they occur simultaneously each year.