A headache is a common condition characterized by pain or discomfort in the head or neck. Headaches can vary in intensity, location, and duration, and may be accompanied by other symptoms such as nausea, vomiting, sensitivity to light or sound, and fatigue. There are many different types of headaches, including tension headaches, migraines, cluster headaches, and sinus headaches, among others.

Tension headaches are the most common type of headache and are often described as a dull, pressure-like pain on both sides of the head. They are typically caused by muscle tension or stress, and may be triggered by factors such as poor posture, lack of sleep, or dehydration.

Migraines are a more severe type of headache that can cause intense pain, sensitivity to light and sound, and nausea or vomiting. They are thought to be caused by changes in blood flow to the brain, and may be triggered by factors such as stress, hormonal changes, certain foods, or changes in weather.

Cluster headaches are a rare but very painful type of headache that typically occur on one side of the head and are often accompanied by eye symptoms such as redness or tearing. They may be triggered by factors such as alcohol consumption, smoking, or high altitudes.

Sinus headaches are caused by inflammation or congestion of the sinuses, which are located around the nose and eyes. They are typically accompanied by symptoms such as a runny nose, congestion, or facial pressure.