Does the bladder heal itself over time?

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.

No: Unfortunately, the only organ know to rejuvenate itself is the liver, if the damage is not too severe or constant. 3 ways to keep bladder healthy: drink 6-8 glasses of water per day, not sodas, alcohol, or coffee. Avoid tobacco, either direct or secondhand. Learn kegel exercise.