Webnighttime nausea is a symptom of various conditions, including pregnancy, anxiety, side effects of medications, gerd, and gastroparesis. Webnausea at night is usually a symptom of an underlying condition. Some of the most common causes include acid reflux, anxiety, medication side effects, peptic ulcers, or. Webif you have nighttime headaches or headaches that awaken you from sleep, see your doctor for an accurate diagnosis. Treatment for nighttime headaches. Webif you’re having headaches and nausea, see your doctor and tell them about your symptoms and what seems to trigger them. They’ll help you figure out what’s. Intense nausea and sweating before an episode.