Unusual Breast Milk Production and Menstrual Irregularities - Obstetrics and Gynecology

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Menstruation, menstrual period


Hello Doctor, thank you for your detailed response last time.
On the 10th of last month, I had milk discharge from my breasts for about two weeks, so I had a blood test done, and the result of 5 was normal.
I also had a breast ultrasound that was normal.
Now, I can no longer express any milk.
I would like to ask why there was a sudden appearance of milk despite the blood test and breast examination being normal.
Is there a reason for this?
Additionally, my menstrual period started on May 17 and ended on the 29th.
Could this be related to the sudden appearance of milk?
On June 9, I noticed a little bit of blood and thought my period was coming, but it only lasted for two days with just a drop or two of blood, and then it stopped.
What could be the reason for this?
Could you please tell me when my next period should normally occur in June?
Do I need to undergo any further examinations? Thank you for your help, Doctor.

Wenwen, 40~49 year old female. Ask Date: 2018/06/14

Dr. Huang Jianzhong reply Obstetrics and Gynecology


Last month on the 10th, I had breast milk for about two weeks, so I had a blood test done, and the result of 5 is normal.
I also had a breast ultrasound, which was normal.
Now, I can no longer express any milk.
I would like to ask why there was a sudden appearance of breast milk when both the blood test and breast examination were normal.
What could be the reason?
Answer: The endocrine system is likely the cause.

Also, my menstrual period started on May 17 and ended on the 29th.
Could this be related to the sudden appearance of breast milk?
Answer: It may be related.

On June 9, I noticed a little bit of blood, and I thought my period was coming, but it only lasted for two days with just a drop or two of blood, and then it stopped.
What could be the reason for this?
Answer: This may indicate hormonal instability.

Doctor, when is my period supposed to come in June to be considered normal?
Answer: Around June 20.

Do I need to undergo any further tests?
Answer: Close observation is recommended.

Reply Date: 2018/06/14

More Info


Understanding unusual breast milk production and menstrual irregularities can be complex, especially after childbirth. It’s important to consider various factors that may contribute to these symptoms, including hormonal changes, physical health, and emotional well-being.

Firstly, the presence of breast milk after a significant period post-lactation can be attributed to several factors. Prolactin, the hormone responsible for milk production, can sometimes remain elevated due to stress, hormonal imbalances, or even certain medications. In your case, since you mentioned that your blood test showed a normal prolactin level, it’s possible that transient elevations could still occur due to other factors such as stress or changes in your body’s hormonal environment. It’s also worth noting that some women may experience galactorrhea, which is the production of breast milk not associated with childbirth or nursing, due to hormonal fluctuations.

Regarding your menstrual cycle, irregularities can often be linked to hormonal imbalances, especially in the postpartum period. After giving birth, it can take time for your menstrual cycle to return to its pre-pregnancy rhythm. The irregular bleeding you experienced on June 9 could be a sign of your body still adjusting. It’s not uncommon for women to experience spotting or irregular periods during this time, especially if they are not breastfeeding or have recently weaned.

As for your question about when to expect your next period, it can vary widely among women, especially in the months following childbirth. Generally, if you are not breastfeeding, your cycle may return to a more regular pattern within a few months. However, if you are still experiencing irregularities, it may be beneficial to track your cycle and discuss it with your healthcare provider.

In terms of further evaluations, if you continue to have unusual breast discharge or if your menstrual irregularities persist, it may be wise to consult with a healthcare professional. They may recommend additional blood tests to check hormone levels, imaging studies, or other evaluations to rule out any underlying conditions.
Lastly, it’s essential to maintain open communication with your healthcare provider about any concerns you have regarding your breast health or menstrual cycle. Keeping a detailed record of your symptoms, including the timing and nature of any discharge or menstrual changes, can provide valuable information for your doctor.

In summary, while your recent tests have shown normal results, the presence of breast milk and menstrual irregularities can be influenced by a variety of factors, including hormonal changes, stress, and the body’s adjustment post-pregnancy. If symptoms persist or worsen, seeking further evaluation is advisable to ensure your health and peace of mind.

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