What causes this kind of headache? Can my sleeping position cause a headache that lingers throughout the day?

Yes, your sleeping position can contribute to headaches that persist throughout the day. Factors such as stress and lack of sleep are known to cause tension headaches. It may be helpful to try relaxation techniques, establish a consistent sleep schedule, create a relaxing bedtime routine, and avoid stimulating activities before bed. Additionally, consider avoiding caffeine, alcohol, and drugs before bedtime, and try using over-the-counter medications like Advil or Tylenol for relief. If these strategies do not improve your symptoms, you may want to speak with a healthcare professional for further guidance.