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.
Organs in the left upper abdomen that would commonly cause pain in a woman include: 1  Stomach. 2  Causing gastritis, stomach ulcer, 3  Left end of the liver equally affected, with same condition as on the right. 4  Spleen. 5  Pancreas. inflammation of this organ leads to pancreatitis.