Problems are lingering, weighty situations that never seem to go away.
One reason problems seem so hard to get through, is because we often are focused on the problem, and this intensifies the situation and keeps us attached. (The law of attraction)
When you think about your problem as a challenge, it seems to change. You have the Universe rooting for you because you have changed a victim mentality into a winner.
Challenges are something you can get over. The word challenge indicates you can conquer or deal with it. This sets up the law of attraction to overcome and win.
Is that situation you are dealing with right now a challenge or a problem?
It's up to you. They say, "A Miracle is simply a shift in perspective."