Not all newborns need vitamin K1 shots. However, it is possible to administer Vitamin K₁ if a newborn is deficient in it. Vitamin K is an important element needed by the human body, and once deficient it may lead to disorders in the blood clotting mechanism, which can cause extensive bleeding, including intracranial bleeding and intestinal bleeding. If a newborn is found to be deficient in vitamin K after birth, it should be injected in strict accordance with the doctor’s requirements, which can play a certain preventive role and reduce the morbidity rate. However, if the newborn is not deficient in vitamin K1 after birth, no special treatment is needed, and it is not necessary to mandatorily require the injection of vitamin K₁. Reminder: vitamin K1 is a kind of pro-coagulant drug, if the newborn after birth has serious liver disease, or has liver insufficiency, should be prohibited, the emergence of adverse drug reactions to timely medical treatment, to avoid the development of the disease.