Your word is: healing.

"H-e-a-l-i-n-g. Healing."

Use 'healing' in a sentence.

"Matt was healing from a knee injury."

Good. Now can you tell me something that can make healing difficult?

"An unhealthy lifestyle and frame of mind."

What is something you can do to help aid your healing process?

"Don't aggravate the injury. It doesn't matter how much you love what hurt you."

You seem to be an expert on healing. Then why can't you seem to do it?

"I don't know."