Can diapers that are one month past their expiration date still be used?

Whether a diaper that has expired by one month can still be used depends on its storage condition and whether it has deteriorated. Generally, if the diaper has been properly stored and shows no signs of spoilage, it may still be safe to use after expiration with no major issues. However, if it has been improperly stored and has deteriorated, using it may lead to problems, and continued use is not recommended. The details are as follows:

If the diapers have been stored in a dry, non-humid environment, remain sealed in their original packaging without any damage, and show no signs of moisture or mold, using them one month past the expiration date is usually acceptable. However, under such conditions, the absorbency of the diaper may decrease, so more frequent changes are necessary to prevent prolonged urine retention, which could cause discomfort.

However, if the diapers were stored in a humid environment, have already been opened, and upon inspection show discoloration—such as turning yellow or black—visible mold spots, or emit an unpleasant odor, they should not be used. Using diapers in this condition may trigger allergic reactions, leading to skin redness, itching, and other related issues.

Regardless of whether diapers are expired or not, they should be monitored regularly during use. If any discomfort occurs, usage should be stopped immediately, and a different brand or a new diaper should be used instead. If symptoms are severe and do not improve even after switching diapers, prompt medical attention is advised.