13. Nausea, vomiting, and abdominal cramps
People with hypoglycemia may also have several gastrointestinal symptoms, including abdominal pain or discomfort, but more usually nausea and vomiting. Since they are often in a fasted state, vomiting might contain a yellow or greenish liquid that is called bile. Note that bilious vomiting might be related to various diseases, and it is an alarm sign in neonates.