If it's on the mend, it's recovering. If you're getting better after being sick or injured, you can be described as recovering. When the unemployment numbers start looking up, you can refer to a recovering economy.
If you like the verb to recover, then you're going to love the adjective recovering — which simply describes something that's returning to a state of health, well-being or former glory. You might hear this adjective used in front of alcoholic as in "recovering alcoholic" to describe someone who has sought treatment for alcoholism.