Does postpartum thyroiditis cause low milk supply?

Postpartum thyroiditis is inflammation of the thyroid after birth. It can cause a phase of increased thyroid activity followed by reduced thyroid activity. Reduced thyroid hormone can affect energy, temperature tolerance, concentration, mood, and the body’s support for milk production.

A change in supply may also relate to feeding frequency, latch, breast or nipple pain, illness, medicines, stress, or the baby’s ability to transfer milk. A feeding assessment and thyroid review can look at these factors together rather than assuming one explanation.

Contact your midwife, doctor, lactation consultant, or infant-feeding service if supply seems lower or your baby is not feeding as expected. Ask for a review of latch, swallowing, feeding pattern, wet nappies, and weight checks. Do not start thyroid supplements or herbal products without advice.

A clinician may examine your thyroid and request blood tests. Keep feeding or expressing according to an agreed plan, and use practical help so you can eat, drink, and rest. Your care team can discuss supplementation if your baby needs additional milk.

Seek urgent medical advice if your baby is unusually sleepy, difficult to wake, feeding poorly, or has markedly fewer wet nappies. Urgent assessment is also appropriate if you have severe weakness, fainting, chest symptoms, or a racing or irregular heartbeat.

Arrange a routine review when low supply continues, your thyroid symptoms are changing, or mood and concentration are affected. Early support can protect feeding plans while the cause is assessed.

Could thyroiditis be affecting my supply, and which blood tests are useful? Can someone observe a feed? How can I support my baby’s intake while my symptoms are being assessed? Are any medicines compatible with my feeding plan?