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 lack of sleep. 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 like ibuprofen or acetaminophen, along with lifestyle changes such as staying hydrated and practicing relaxation techniques. If headaches are severe or persistent, it is important to consult a healthcare professional for proper diagnosis and treatment.