why do i wake up nauseous

Waking up nauseous can be caused by several factors. Common reasons include low blood sugar after a long period without eating, acid reflux or GERD (where stomach acid flows back into the esophagus), anxiety or stress affecting the gut, dehydration especially after alcohol intake, pregnancy (morning sickness), sleep disorders, and digestive issues such as gastroparesis, food poisoning, or constipation. Other potential causes include migraines, sinus congestion with postnasal drip, and certain medications or medical conditions like peptic ulcers and gallstones. Adjusting eating habits, sleeping positions, and managing stress can sometimes help reduce morning nausea, but persistent symptoms should be evaluated by a healthcare professional.