There are three things that keep you from divine healing.
The first one is all the reasons why you can't be healed.
The doctor said it was incurable. Your loved one prayed for healing and didn't get it. On and on... excuses why you can't be healed.
Once you overcome all of that, you'll be faced with the next challenge. There will be an action you have to take.
This action will require faith because it will be something that seems irresponsible, or something you don't want to do, or something that would cause embarrassment if it didn't work out.
But once you take that action, healing comes. It's not that the action earned healing. It just revealed faith. You believed, so you did it.
Even then, that's not the end. There's another challenge that comes almost immediately to try to convince you to go back to sickness.
It'll come from a trusted source, or maybe even your own thoughts. It sounds like this:
"It probably won't last. Was it even real, or was it just coincidence?"
How you respond to these lies will determine if you remain healed or not. Will you stick with Jesus who already healed you? Or are you going to side with the opposition?