Headaches can be classified into two main types: primary and secondary. Primary headaches, such as tension headaches, migraines, and cluster headaches, occur independently and are not caused by other medical conditions. Tension headaches are often related to stress, while migraines can involve severe pain, nausea, and sensitivity to light. Cluster headaches are intense and occur in cyclical patterns. Secondary headaches are symptoms of underlying health issues, such as sinus infections, head injuries, or high blood pressure. These headaches can vary in intensity and duration, depending on the cause. Identifying the type of headache is essential for effective treatment and management.