When “just drink more water” isn’t the answer

There is a kind of tired that a nap fixes, and a kind that it doesn't. Mothers get told to drink more water and go to bed earlier for both.

The advice is not wrong, exactly. It is just that some fatigue has a cause, and causes can be treated.

The tiredness that is just the season

Broken sleep is genuinely exhausting and does not require a diagnosis to explain it. Adults generally need at least seven hours, and in 2024 about 30% of American adults were getting less — a figure that will surprise nobody who has fed a baby at three in the morning.

If your sleep is fragmented, the tiredness is explained. That is real, it counts, and it deserves help rather than a supplement.

When it is worth investigating

The distinguishing feature is usually that rest doesn't touch it. A few patterns are worth paying attention to.

• You sleep a full night and wake unrefreshed anyway
• You are breathless on stairs you used to manage
• It arrived suddenly rather than accumulating
• It comes with something else — hair loss, a racing heart, feeling cold when nobody else is, weight changing without trying
• It is getting worse over months rather than fluctuating with the week

The common culprits

Most fatigue with a medical cause in mothers comes down to a short list, and all of them are found with fairly ordinary blood tests.

• Iron deficiency, with or without anaemia — the single most common, and more likely with heavy periods or closely spaced babies
• Thyroid trouble. Postpartum thyroiditis affects somewhere between 3 and 8% of pregnancies, often overactive around one to three months after birth and underactive around three to six, and it is frequently mistaken for ordinary new-mother exhaustion
• B12 or vitamin D deficiency
• Depression and anxiety, which announce themselves as physical tiredness far more often than people expect
• Sleep apnoea, which is underdiagnosed in women and does not only affect people who snore loudly

How to get taken seriously

Fatigue is a hard symptom to bring to an appointment, because it sounds like complaining about being a parent. Specifics change that.

• Say how long. "Since March" lands differently from "a while"
• Say what it stops you doing, concretely — the walk you gave up, the stairs you now pause on
• Say that rest doesn't fix it, if that's true
• Mention everything alongside it, even if it seems unrelated
• Ask directly: "Could we check iron, ferritin, thyroid and B12?"

Ferritin is worth asking for by name. A standard blood count can look fine while your iron stores are running low.

While you wait

None of this replaces the appointment, but none of it will hurt: eat something with protein at breakfast, get outside in the morning light, and move a little even when it is the last thing you want.

And accept help with the nights if it is offered. Sleep is not a luxury you earn after everything else is done — it is the thing everything else runs on.