Hearing a crack or pop in your knees when you squat is quite common, and most of the time, it’s harmless. It’s usually caused by tiny bubbles of gas in your joint fluid popping when you move. But, if the cracking is painful or your knees feel swollen or unstable, it could be a sign of a problem like....

Yes, blood donation is good for health. Some studies have shown a decrease in Cancer risk, as well as decrease in the damage to the liver and pancreas in the long run. One should definately donate blood, ofcourse after the entire pre-requisites are cleared.

Simple difference, An ECG checks your heart’s rhythm. An echocardiogram shows a live picture of your heart.