We have to solve this problem.

She was a problem child, always in trouble with the police.

He is often referred to as a problem child because of his difficult behavior.

I have been dealing with a back problem for years.

What seems to be the problem?

Edwin Why are you mad at me? What's your problem?

It's not my responsibility, it's somebody else's problem.

I have been suffering from sinus problems for years.

The new policy has raised some problematic issues.

The situation is becoming increasingly problematical.