Stones in kidney

My colleague complained of pain in his kidney yesterday.

After examinations, he is confirmed to have stones in his kidney.

Why there are stones in our body?

It may be caused by the internal structure of our kidney which can accumulate ions.

It may be caused by taken in too much salts in our foods.

May be ..........

Sorry, I am not a doctor.

Drinking three litres of water a day will help to rid of the stones from our body.

Water is good for us.