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.
Some of these causes include. 1  Gas in colon (Splenic Flexure Syndrome) â Excessive amount of gas formed and trapped in the colon can cause pain in the upper left side of the abdomen and this area is felt below the left rib cage. Pain and discomfort under left rib cage may be experienced after consumption of food.