During this period I consume more cold water so that I will not really feel the heat.

It's so tempting to consume cold water during the heat season because of how refreshing it feels. But dear friend, avoid the temptation of consuming too much cold water because it has its down side as well. For some people, it leads to digestive issues. Cold water tightens the blood vessels in the stomach and slows down digestion which can later lead to indigestion.

Just try as much as you can to avoid too much of it.