You take Excedrin. It works for a few hours. Then the headache comes back - sometimes worse… This is called a rebound headache. The medication creates the problem it's supposed to solve 😵 Here are the real causes of chronic headaches: 1. Cervical nerve inflammation The nerves in your upper neck (C1-C3) directly affect head pain. When these nerves are compressed or inflamed, you get headaches. No amount of Advil fixes a nerve problem. 2. Cellular oxygen deficiency Your brain uses 20% of your bod

What a headache: there's a nationwide shortage of popular pain reliever Excedrin