I have had a revelation lately that has made quite a difference for me. I struggle with allergies and an occasional sinus headache. I have always been perplexed as the headaches often come on when there is also added stress in my life and so I thought if I rested or slept, it might help. BUT many times when I slept on it for the night, I woke up with an even worse headache. So, I tried something different when I slept and that was adding a pillow or 2 more then what I usually use under my head so that it was elevated. My headaches would be gone in the morning. Then recently a family member had a bad cold that would lead to coughing a lot in the night, but when she slept with her head more elevated it would cut the coughing spells down.
Of course, I love that this is of course all natural and free! Hope it helps someone!