Propping your head up provides other benefits, too. According to Dr. Phyllis Zee, the Chief of Sleep Medicine at Northwestern Medicine, it “can help with snoring and breathing,” which is “particularly relevant for people with breathing disorders, such as sleep apnoea, asthma, as well as people with heart conditions, such as heart failure.”
Article source: https://www.huffingtonpost.co.uk/entry/propping-head-up-pillow-sleep_uk_6ae35a86e4b09cd24b6c6cf2