14 year old son drinks more than 2l of water a day and urinates more frequently and this goes on at night as well he wakes up to drink water and urinate. he has never been sick in his life even as a baby. should i be worried?

Possibilities: There is a possibility that this is a simple drink/pee habit due to an obsession with drinking often. The kidney would respond by diluting his pee & not retaining the normal amount of water to keep thirst down. There is also defects in the kidney where they can't retain water that needs attention (diabetes incipidus). It can also be a sign of regular diabetes. Discuss it with his doc.