Webnighttime nausea is a symptom of various conditions, including pregnancy, anxiety, side effects of medications, gerd, and gastroparesis. Webcauses of nausea at night. There are several reasons why you may experience nausea specifically at night, according to hiten patel, m. d. , a family. Webone of the most immediate and noticeable effects of night shift work is sleep deprivation. The human body is naturally programmed to sleep at night, and forcing it to stay awake. 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,. By maureen salamon, executive editor, harvard women's health watch. We can feel groggy when our sleep schedule is thrown off even just a little.