Why my head hurts when I lay down

There are several possible reasons why your head may hurt when you lay down. One common cause is tension headaches, which can be triggered by stress, muscle tension, or poor posture. Another possibility is sinus congestion, which can cause pressure and pain in the head when you lay down. Migraines are also a common cause of head pain, and symptoms can be triggered or worsened when lying down. It is important to consult with a healthcare provider to determine the exact cause of your head pain and receive appropriate treatment.