Headaches can sometimes be related to dehydration or electrolyte imbalance. In such cases, plain mineral water may help indirectly by improving hydration and providing minerals. However, headaches have many causes—migraine, blood pressure changes, poor sleep, stress, infections—so mineral water is not a “headache medicine.” If headaches are frequent, severe, accompanied by neurological symptoms, or newly onset, clinical evaluation is important. Supportive strategy includes adequate hydration, sleep regularity, trigger management, and medical treatment when needed.