Whether infant lactose intolerance can self-heal needs to be identified as either congenital or secondary. If it is congenital lactose intolerance, it means that the baby's own intestines cannot produce lactase, and thus the symptoms of lactose intolerance cannot be alleviated.

However, secondary lactose intolerance, such as that caused by chronic diarrhea or infection which leads to a reduction in lactase, can be recoverable. The reduction in lactase production caused by chronic diarrhea does not mean that the intestines have lost their normal function to secrete lactase. Therefore, by using lactose-free formula or avoiding foods containing lactose, the normal intestinal flora can be repaired, achieving relief from the symptoms of lactose intolerance.

Additionally, if there is a viral infection, particularly rotavirus infection-induced lactose intolerance, it can also be alleviated through dietary adjustments to promote the repair of the intestinal flora. Therefore, the treatment of lactose intolerance should vary from person to person, and it is important to identify early whether it is primary or secondary.