Can a full stomach cause headache?

While indigestion and other gastrointestinal issues can cause headaches, a full stomach in and of itself is not likely to directly cause a headache. Headaches are often associated with specific medical conditions, lifestyle factors, or triggers, such as stress, lack of sleep, dehydration, or certain foods or beverages. If you are experiencing headaches frequently, it is important to consult with a healthcare professional to determine the underlying cause and receive appropriate treatment.