In short: Lactation crisis is a temporary decrease in milk production associated with a growth spurt in the child. Milk does not "disappear". The main way to cope is to put the baby to the breast more often. Usually, after 2-4 days, lactation is restored.
Do not rush to introduce formula: The introduction of supplemental feeding with formula reduces the number of attachments to the breast, which further reduces milk production. If you decide on mixed feeding, read how to organize it correctly.
This material is for informational purposes only and does not constitute medical advice and is not a substitute for medical advice. If a child has alarming symptoms, a pronounced deterioration in health, problems with breathing, feeding or weight gain, it is necessary to contact a qualified medical specialist as soon as possible, and not rely only on information from the Internet.