Waiting and treating are the two options this question implies. OrthoInfo (AAOS) says two things that can look like they pull apart, so they are worth reading side by side.
Does the disk heal, or just the pain?
Probably not the disk itself, but the pain often eases. OrthoInfo (AAOS) notes that nonsurgical treatments do not heal the herniated disk. The same source says that even though a herniated disk can be very painful, most people feel better within a few weeks or months without surgery.
Why the disk can stay the same while the pain fades
One statement is about the disk and the other is about how people feel. A person can feel better while the disk is unchanged. A few weeks or months is also a wide range, so we do not promise a date.
Comparing what staying put costs you
Waiting has a cost if the pain keeps you from work or sleep, and treating has commitments of its own. Ask any clinician what each option involves and how long it lasts. For general reading, try the WebMD pain management center, the OrthoInfo sciatica page, the American Academy of Pain Medicine or the Cleveland Clinic pain management overview.
Getting fees and terms in writing
Before you weigh one option against another, get any fee schedule or agreement term in writing. Our comparisons stop short of medical advice, and a clinician decides your plan.