I have a friend (23 yrs old) who says he's having persistent stabbing pain from his lungs. Breathing, he says, really hurts especially when he tries to sleep at night. The pain is so bad, he often doesn't sleep until the morning.

But when he's out mountain biking or jogging or playing tennis (he's really active), he says it doesn't bother him as much.

He says he often coughs up blood. (And I've noticed that he's become more aggressive, sometimes angrier and depressed.)

The pain, he says, started a couple years ago after he hit his head on the concrete during a game. (don't remember which sporting activity it was).

He says he never got medical treatment after the head injury (no medical insurance) but that his head hurt for a long time and he began having the lung pain.

Sometimes the pain is so bad he says he wants to die. He went to a naturopathist who said the head injury was the reason for the lung pain.

I'm worried that his symptoms may get worse. Any suggestions?