All sorts of different studies are pointing to how lack of sleep damages brain cells. One recent study found that in mice 25% of certain brain cells died as a result of a prolonged lack of sleep. Other studies have found lower integrity white matter in the brain, possibly as a result of lack of sleep.
1 Food poisoning; food poisoning can also cause pain in the lower left abdomen. 2  Moreover, it can cause nausea, vomiting or diarrhea and fever. 3  Symptoms usually occur for 24-48 hours. 4  For some cases, need to be hospitalized.
Irritable bowel syndrome or IBS can cause a lower right side abdominal pain, though it usually causes a left lower abdominal pain rather than pain on the right side. IBS is more common in young people between the ages of 13 to 30, and more common in women than in men.