There is no current consensus among biologists on the questions of how sex in Eukaryotes arose in evolution, what basic function sexual reproduction serves, and why it is maintained, given the basic two-fold cost of sex.
Excessive production of gas by bacteria is a common cause of intermittent abdominal bloating/distention. Bacteria can produce too much gas in three ways. First, the amount of gas that bacteria produce varies from individual to individual.
We tend to lose water as we get older. Dehydration (lack of fluids in your body) produces low blood pressure (hypotension) which can bring on a fall. Dehydration can also cause confusion, loss of balance, constipation, and many other unwelcome symptoms.