A headache is a common condition characterized by pain or discomfort in the head, scalp, or neck. It can vary in intensity and duration, and may be caused by various factors such as stress, dehydration, or tension. There are different types of headaches, including tension headaches, migraines, and cluster headaches, each with distinct symptoms and triggers. Most headaches can be managed with over-the-counter medications, rest, and hydration. However, persistent or severe headaches may require medical attention to rule out underlying conditions. Maintaining a healthy lifestyle, including regular exercise and proper sleep, can help reduce the frequency of headaches.