Nurses solve problems such as postpartum hypogalactia, hypogalactia and breast pain. Generally speaking, the training course of prolactin lasts for 10~ 15 days, and the cost is about 2500 yuan. After passing the study, all prolactinists can obtain certificates issued by the state. Certificates are generally trained in local training institutions or labor and social security departments, and then the institutions or departments organize examinations in a unified manner. Only by passing the exam can they get a certificate and complete their studies.