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It seems that you have been affected by bacterial infection most probably due to contaminated food you have taken. The common species like shigella and salmonella
are responsible for alternating and diarrhea
. Such condition affects intestinal mucosa which then loses is its active motility and results into burping and bloating
It is recommended to have stool analysis use some antidiarrheal like metronidazol along with antispasmodic and motility enhancer like domeperidone. Use fiber diet and fresh juices. avoid fatty and spicy foods.