Tag: Why do I feel nauseous when I wake up

Why Do I Feel Nauseous When I Wake Up? Causes, Symptoms, and Treatment Quick Answer (TL;DR): Morning nausea is most commonly caused by gastroesophageal reflux (GERD) while lying flat, nocturnal hypoglycemia (overnight blood sugar dips), high early-morning cortisol levels (stress response), or post-nasal drip. Other frequent causes include pregnancy (morning…