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.
Muscles of the wall of the left side of the abdomen ; Illnesses in any of these structures can give rise to pain in left side of abdomen area. Causes of Pain in Left Side. There are various causes of left side pain in the left abdominal area and the following are a list of the most common causes: 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. Constipation.