Yes. Our bodies as a whole usually do a great job of self-repair; as long as there is nothing to hinder the work efforts. Examples include poor nutrition, certain disease processes, certain exogenous substances and medications.
Depends.... It depends on what it is healing from! from a urinary tract (bladder) infection - yes. From cancer - no. We need a little more information on what you're healing from. Or go see your urologist for answers specific to your case.