Does caffeine remove headache if it is caused by stress ?

Yes: But if used too often it can cause rebound headaches.Caffeine is also known as an "analgesic adjuvant, " which means that it is an ingredient added to pain relievers to make them work more effectively. Medical research has conclusively demonstrated that caffeine, when combined with Aspirin or acetaminophen, can significantly improve effectiveness in relieving tension-type headache and migraine. This is from the national headache foundation website.