Lighthead is a term often used to describe a feeling of dizziness or lightheadedness, which can occur for various reasons. This sensation may arise from dehydration, low blood sugar, or standing up too quickly. It can also be a symptom of anxiety or stress, leading to a temporary feeling of faintness. In some cases, lightheadedness can indicate a more serious health issue, such as a heart condition or neurological disorder. If the feeling persists or is accompanied by other symptoms like fainting or confusion, it is important to seek medical attention to determine the underlying cause.