Do Teenagers wear Diaper

Not usually, but some do. Although some children do have serious bladder problems or are disbaled so they are required to wear a diaper so that they do not wet themselves. It would usually be a huge embarrassment for a teen to wear a nappy of some kind.

I am pretty sure that some hikers around the world though use daipers so that when they are hiking they do not have to stop to use the toilet and can just go in their pants and then empty it once a day or whatever.