A baby may urinate instantly when a diaper is opened, as shown in a 2026 Instagram video by Dr Sermed Mezher, highlighting diaper-changing best practices.
Male infant urination during diaper change
A male infant may urinate as soon as the diaper is opened, sometimes with a jet upwards. This phenomenon is not guaranteed but is recognized as possible in some cases.Sensory changes trigger urination
When a diaper is opened, several things change suddenly for the baby: the sensation of heat, the humidity, the contact on the skin, sometimes the cold of the air or a wipe. In some infants, this change can promote urination.Anatomical factors influence urine direction
In boys, anatomy makes it possible for the stream to go upwards or outward if the penis is not covered or oriented downward. This is why covering the genital area during diaper changes is often recommended.Video illustrates common experience
In the video, the account drsermedmezher describes a consultation scene around a weighing: the diaper had to be removed to get a more accurate weight, and the baby urinated immediately. This scenario is familiar to many parents who have experienced similar moments on the changing table.Recommendations focus on preparation
Public pediatric recommendations go in the same practical direction: during the diaper change, it is better to anticipate. The central idea is simple: prepare everything before opening the diaper and do not leave the baby's genital area uncovered unnecessarily.
