This feeling of fluttering in the stomach may be due to peristaltic movements of the food in
the intestines or due to muscle cramps
are seen in
prolonged exercise,stress and anxiety,anemia,dehydration and deficiency of sodium, potassium, magnesium, and calcium and in serious disorders like myotonia,vascular disorders and neurodegenerative diseases.
Eat healthy nutritious food and keep yourself well hydrated.