If someone have disturbed prolactin hormone, then they what did first?

Many reasons: For an elevated prolactin level. Why was it drawn? Ask your doctor what to do next - or see an endocrinologist or ob/gyn.

Many causes: High prolactin levels can cause loss of regular periods and milky breast discharge in women, or low testosterone levels in men. The most common cause is a benign tumor in the pituitary gland, but there are other causes as well including large tumors near the pituitary glans, low thyroid levels, certain meds used to treat nausea or psychiatric conditions, or seizures. See your doctor!