Nausea
Nausea is stomach discomfort, and it causes a vomiting sensation. In individuals that consume melatonin, it can be a precursor to vomiting the contents of the stomach. There are various causes of nausea which include infection or virus, motion sickness, and diet.
Nausea [3] may be due to ulcers or sores in the stomach or lining of the small intestine. When an individual eats, an ulcer can cause a severe burning sensation. Note that overeating certain types of foods like high-fat foods or spicy ones can cause stomach upset, leading to nausea.
Doctors may help in treating nausea through medications and staying hydrated. There are certain nausea triggers that individuals should avoid. Examples include flickering lights, heat and humidity, sea voyages, and strong odors like perfume and cooking smells.