Key takeaways: Dysphoric milk ejection reflex (D-MER) is a sudden negative feeling, such as sadness, anxiety, or dread, that starts just before letdown and fades within minutes. It’s thought to relate to hormone changes during letdown. It’s different from postpartum depression, though both can happen. Awareness, distraction, and self-care often help.
Some breastfeeding parents feel an unexplained wave of negative emotion right as their milk lets down. This is called D-MER.
What It Feels Like
- Sudden sadness, anxiety, dread, hopelessness, or irritability.
- Starts just before the milk ejection (letdown) and lasts seconds to a couple of minutes.
- Happens with each letdown, including during pumping or spontaneous letdowns.
- Feelings fade once letdown passes.
What Causes It
D-MER was first described in a 2011 case report by Heise and Wiessinger. The leading theory is that a sudden drop in dopamine during letdown triggers the negative feeling. Research is still limited.
How It Differs From Postpartum Depression
- D-MER: brief, tied to letdown, with normal mood between feeds.
- Postpartum depression: lasting low mood, loss of interest, and other symptoms throughout the day.
Some people have both. Ongoing low mood needs a doctor’s evaluation.
What Helps
- Knowing what it is often helps a lot, since it’s not “in your head” and not about your baby.
- Distraction: have a snack, read, watch something, or talk with someone during letdown.
- Self-care: rest, hydration, and nutrition.
- Track patterns: some people notice it’s worse with stress, caffeine, or sleep deprivation.
- Talk with your doctor if it’s severe. Some people have tried medications, but evidence is limited.
Does It Go Away?
For many people, D-MER lessens over the first months, though some experience it throughout breastfeeding.
Contact your doctor right away if you have: low mood most of the day, thoughts of harming yourself or your baby, or feel unable to cope. Call or text 988 (the Suicide and Crisis Lifeline) or 1-833-TLC-MAMA (the National Maternal Mental Health Hotline) for support.
The Bottom Line
D-MER is a brief, real, hormone-related response to letdown. Understanding it and using distraction often helps. Get care for any ongoing low mood.
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Sources
- Heise AM, Wiessinger D. Dysphoric milk ejection reflex: a case report. Int Breastfeed J. 2011;6(1):6.
- Uvnäs-Moberg K, Kendall-Tackett K. The mystery of D-MER: what can hormonal research tell us about dysphoric milk-ejection reflex? Clin Lact. 2018;9(1):23-29.
- Health Resources and Services Administration. National Maternal Mental Health Hotline. https://mchb.hrsa.gov/national-maternal-mental-health-hotline
This article is for general education and is not a substitute for individualized medical advice. Always talk with your baby’s health care provider or your own provider about your specific situation. If you think your baby or you may have a medical emergency, call 911.
