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.
There are various causes of left side pain in the left abdominal area and the following are a list of the most common causes: 1  Food poisoning. Consuming contaminated food can lead to food poisoning. This can result in vomiting and fever as well as severe pain in the left side to the abdomen. 2  Constipation.