Getting headaches every day can be caused by various factors, including common medical conditions and lifestyle habits. Common causes include tension headaches often related to stress and muscle strain, migraines which can be triggered by hormonal changes and foods, medication overuse headaches from frequent medication use, chronic sinusitis, and dehydration. Lifestyle factors like poor sleep, irregular eating habits, high caffeine intake, excessive screen time, and substance use also contribute to daily headaches. Additionally, conditions like sleep apnea, teeth grinding at night, anxiety, depression, and medication overuse can lead to persistent headaches. It is important to seek medical advice if headaches are severe, persistent, or accompanied by other symptoms like vision changes or dizziness to rule out underlying health issues and receive proper treatment.