A headache is a common condition characterized by pain or discomfort in the head, scalp, or neck. There are various types of headaches, including tension headaches, migraines, and cluster headaches. They can be triggered by factors such as stress, dehydration, lack of sleep, or certain foods. Most headaches are not serious and can often be managed with over-the-counter medications like ibuprofen or acetaminophen. However, persistent or severe headaches may require medical attention to rule out underlying conditions. Maintaining a healthy lifestyle, including regular hydration and sleep, can help reduce the frequency of headaches.