What is prolactin, what factors or causes lead to hyperprolactinemia

Patient's question:

Because of uterine bleeding, I went to the hospital for treatment. Blood was drawn for testing and it was found that

Doctor's answer:

Patient is female, 32 years old, found hyperprolactinemia after blood test following uterine bleeding.
Considered to be hyperprolactinemia.
Medical advice:
Prolactin is a hormone that promotes milk secretion in women. Its increase can be caused by many factors, such as being in the lactation period or endocrine disorders. However, it is not ruled out that it may be due to a head tumor.
If you want to check whether it is caused by a head tumor, a head CT scan can be performed for preliminary screening.
If it is caused by endocrine disorders, the endocrine status needs to be regulated.
If it is caused by external factors, the external stimulating factors need to be removed.
Therefore, it is necessary to trace the primary cause and treat accordingly.
Doctor's inquiry: