In principle, diapers should be changed whenever they are wet or dirty. In general, diapers should be changed within a period of no more than 4 hours. They must be changed when there is a feces. However, you cannot observe your baby in real time and there are always missed changes. It is recommended that you focus on the following time points for efficiency. 1. 10-20 minutes after each feeding. 2. after each defecation. 3. before going to sleep. 4. after waking up; 5. Don't forget to change diapers frequently when you take your baby out.

It mainly depends on the size of children, because the defecation frequency at different stages is different, but the absolute principle is to change when it is dirty, so how to find it is particularly important.

Are you talking about diapers for adults or children? In any case, as long as there is a stain, it needs to be replaced, so as to be hygienic and healthy.