Can a 23mm residual stone pass on its own?
Generally speaking, a residual size of 23mm usually refers to the size of residual material remaining in the body after certain medical procedures or disease treatments, such as intrauterine contraceptive device residue, post-surgical remnants, or calculi (stones). If the residual material is large in size, it generally cannot be expelled naturally, while smaller residues may be expelled spontaneously. Detailed analysis is as follows:

In most cases, a 23mm residual object is considered relatively large and typically cannot be expelled naturally. If the residue is located in the bile duct or intestine, its size may cause blockage of the duct, leading to pain or other complications. Medical removal via endoscopy or surgery is usually required.
The human body has a certain capacity for self-repair and clearance, such as the digestive and urinary systems. These systems may sometimes process and expel small foreign objects. If the residue is a 23mm small stone or similar object that is sufficiently small and lacks sharp edges, it may be expelled naturally via urine.
It is recommended to undergo medical evaluation under a physician's guidance to determine whether spontaneous expulsion is possible, and to implement appropriate medical interventions. Self-management should be avoided to prevent more serious health complications.