Can my belly button not heal properly if the bottom part of one stitch is left in it?

Thank you for your question.  Your surgeon is correct that the retained stitch that was cut off will likely come out on its own in time.  Even if it doesn't, the material is pretty inert and unlikely to cause a healing problem.  Best wishes on your recovery!

Sutures are made of different materials. Some are "absorbable" and are not permanent. THe body has the ability to break them down over time. In some cases, the process of breaking down the sutures can lead to an inflammatory response which may result in the tissues appearing reddened. Permanent sutures are made of material that cannot be broken down by the body and thus remain unchanged or inert. In some cases the rectus fascia is repaired with permanent sutures in other cases very slowly absorbable sutures are used which allow the scar tissue to form before the sutures break down. In the belly button both kinds of sutures can be used. The non absorbable sutures are often used at the skin level as they cause the least inflammatory response. Timing of removal of sutures is at the surgeons discretion based on wound healing. Follow up with your plastic surgeon is always a good idea. For second opinions check the Smart Beauty Guide for a board certified plastic surgeon who is also a member of the prestigious American Society for Aesthetic Surgery.

Hi, there.  Depending on what kind of suture was used, the suture may "fall out on its own."  However, if your belly button skin gets irritated or if the stitch does not fall out by itself, please see your plastic surgeon to get the rest of the suture material out.  Best regards.