3) Lactose intolerance
An individual who has intolerance towards lactose usually find it very difficult to digest milk as well as the milk containing products like yogurt and cheese. It is because the affected person has a deficiency in the production of an enzyme named lactase. Lactase is responsible for the breakdown of lactose which is found in milk and contains the simple sugar galactose and glucose.
When an individual has a high level of lactose into his bloodstream, he has a tendency to develop the symptoms linked with the lactose intolerance like diarrhea, bloating, nausea, gas pain, rumbling or growling stomach and pain in a left lower side of an abdomen.