DS is 15.
He's telling all sorts of lies to friends. That he's been in boxing matches and is a pro gamer are a couple of examples.
Should I see this a mental health issue?
They are things he would love to be and I'm concerned he is blurring fantasy and reality? he does do a couple of unusual sports to a high standard, so I can't understand why he needs to make up stories about things he has never done ?