Headache and nausea symptoms can be triggered by various factors, including stress, lack of sleep, hormonal changes, certain foods and drinks, and medications. Other common triggers include changes in altitude, strong odors, and bright lights. People with migraines are also prone to experiencing headache and nausea symptoms triggered by specific foods, lack of sleep, and changes in weather patterns. It is important to identify and understand individual triggers in order to prevent or minimize headache and nausea symptoms. Keeping a journal of headaches and their triggers can help individuals develop a pattern and better understand what triggers their symptoms.