Low milk supply: causes, signs and how to increase it

Breastfeeding · Updated July 2026 · All articles

Worrying that you do not have enough milk is one of the most common reasons parents stop breastfeeding earlier than they planned. The reality is that most people who feel they have low supply actually have enough milk for their baby. But true low supply does exist, and understanding what causes it, how to recognise the difference, and what evidence-backed steps actually help makes it much easier to know what to do.

Perceived low supply versus true low supply

Most of the time, a parent's concern about supply is not matched by a real shortfall in milk. This is called perceived low supply, and it is very common. It tends to appear when a baby feeds frequently, seems unsettled after some feeds, or goes through a growth spurt and wants to nurse almost constantly. Breasts that feel soft, pumping small amounts, or a baby who will accept a bottle after a feed are often taken as proof that supply is low, but none of these are reliable indicators on their own.

True low supply means your baby is not gaining enough weight, is producing fewer wet nappies than expected, or shows signs of dehydration. These are the signs that genuinely indicate a problem. Everything else needs to be interpreted carefully alongside weight and nappy output.

How to tell if your baby is getting enough milk

Two signs give you the most reliable picture. First, weight gain: after the initial loss of up to ten percent of birth weight in the first few days, most babies regain their birth weight by around two weeks and then continue to grow along their curve. Second, wet nappies: from around day four or five, you should expect at least six wet nappies in every 24 hours. Nappies should feel heavy and the urine should be pale yellow or nearly clear.

A baby who is alert during awake periods, shows periods of contentment between feeds, and feeds at least eight times in 24 hours is usually getting plenty. Frequent feeding, especially in the evenings and during growth spurts (typically around three weeks, six weeks, and three months), is normal infant behaviour and is not evidence of low supply.

If you are concerned, ask your health visitor or midwife for a weight check rather than trying to estimate supply by how much you pump. A pump is not as effective as a baby at removing milk, so pump output is an unreliable guide to how much milk your body is making.

What genuinely causes low supply

When supply really is lower than it should be, there is almost always a specific reason. The most common is inadequate milk removal. Milk production works on a supply-and-demand basis: the more milk is removed from the breast, the more the body makes. If a baby is not feeding effectively because of a poor latch, tongue tie, or infrequent feeds, the breast never receives the signal to increase production.

Tongue tie is a significant and often missed cause. When the frenulum under the tongue restricts movement, a baby cannot draw the nipple and areola deeply into their mouth, which means less milk is transferred and less stimulation reaches the breast. This can cause supply to plateau even when a parent is feeding frequently. If you notice clicking sounds during feeds, a compressed or ridged nipple after feeds, or pain that does not improve with positioning changes, it is worth asking your health visitor or GP for a tongue tie assessment.

Hormonal causes are less common but real. Polycystic ovary syndrome (PCOS), thyroid disorders (both overactive and underactive), and retained placental tissue can all interfere with the hormones that drive milk production. Retained placenta prevents the drop in progesterone that signals the body to begin full milk production, so if your milk never fully came in and you had a complicated delivery, it is worth mentioning this to your doctor.

Previous breast surgery, including reduction mammoplasty, augmentation, and biopsy, can affect the glandular tissue or nerves involved in milk production. The extent of any impact depends on the type and placement of incisions. Some people who have had breast surgery go on to feed fully, while others find supply is significantly limited. A lactation consultant can help you assess what is possible in your situation.

Insufficient glandular tissue (sometimes called hypoplasia) is a less common but important cause. Breasts that did not grow significantly during puberty or pregnancy, or that have a tubular shape, may not contain enough milk-producing tissue. This is not your fault and is not related to breast size in general terms.

What does not work

Clock-watching and scheduled feeding are counterproductive. Limiting feeds to a fixed schedule reduces the number of milk-removal signals your body receives and can genuinely reduce supply over time. If there is a concern about supply, the last thing to do is feed less often.

Drinking large volumes of extra water beyond thirst has no proven effect on milk volume. Staying well hydrated is important for your overall wellbeing, but forcing extra fluids does not increase output.

Herbal teas marketed for milk supply have little robust clinical evidence behind them. Some contain fenugreek, which has mixed trial results and can cause digestive side effects in some people and their babies. These products can be used alongside proper feeding support but should not be the first line of action.

What actually works: feeding strategies

The most effective approach is always to increase how often and how completely milk is removed. Feed on demand, aiming for at least eight to twelve feeds in 24 hours. Offer both sides at each feed rather than limiting to one side per session. During a feed, you can practise switch nursing: move the baby to the second breast as soon as they slow their suck-swallow rhythm on the first side, then switch back again. This repeated stimulation prompts multiple let-downs and leaves the breast more thoroughly drained.

If your baby is not feeding effectively, consider adding pumping sessions between or after feeds. Even ten minutes of pumping after a feed sends an extra signal to produce more milk. Power pumping is a more intensive technique: set aside one hour each day and alternate between pumping for 20 minutes, resting for 10, pumping for 10, resting for 10, and pumping for 10. The rhythm mimics a baby cluster feeding and can give supply a meaningful boost within several days.

When supply may genuinely be limited

For some people, even with optimal feeding support, supply does not meet their baby's full needs. This might be due to the causes above (hormonal conditions, glandular tissue, surgery) or to a situation where supply cannot be fully re-established after a significant gap in feeding. In these cases, combination feeding with infant formula alongside breastfeeding is a valid and caring choice. Continuing to breastfeed for whatever amount of milk you can produce still passes immune factors, supports bonding, and has value regardless of whether it is your baby's sole or partial source of nutrition.

A lactation consultant (look for the IBCLC credential) can help you put together a realistic plan, assess latch and tongue function, and work through whether there is an underlying cause. Your health visitor is also a good first point of contact in the UK. You do not have to navigate this alone.

Frequently asked questions

How can I tell if my baby is getting enough milk?

The most reliable signs are weight gain and wet nappies. After the first few days, your baby should have at least six wet nappies every 24 hours and be gaining weight along their growth curve. A baby who is alert, has periods of contentment between feeds, and is producing pale yellow or clear urine is almost certainly getting enough milk. Frequent feeding, not settling after every feed, and wanting to feed constantly are normal newborn behaviours and are not proof of low supply.

Does soft breasts mean I have low supply?

No. Soft breasts after the first few weeks are normal and do not indicate low supply. Early on, breasts often feel full between feeds as supply is establishing. Once supply regulates, usually by six to twelve weeks, many people find their breasts feel softer most of the time. This is a sign that your body has calibrated to your baby's needs, not that supply has dropped.

What actually works to increase milk supply?

The single most effective approach is removing milk more often and more completely. That means feeding on demand, switching sides during a feed (switch nursing), ensuring a deep latch, offering both sides at every feed, and adding pumping sessions between feeds. Power pumping (cycling pump on and off for one hour each day) can also boost supply by mimicking a cluster feed. Staying hydrated and well-nourished supports your body, though extra fluids beyond thirst do not directly increase supply.

Do galactagogues like fenugreek really work?

The evidence for most galactagogues (foods or supplements said to boost supply) is weak. Some people report benefit from fenugreek, oats, or domperidone (a prescribed medication in some countries), but none have strong, consistent clinical trial support. They should be considered alongside, not instead of, improving feeding frequency and latch. Always talk to your doctor before taking any supplement or medication.

Can I still increase supply if my baby is three months old?

Yes. Supply can be increased at any stage of breastfeeding, though it may take longer if supply has been low for a while. The same principles apply: increase the frequency of milk removal, ensure a good latch, and consider adding pump sessions. Working with a lactation consultant (IBCLC) can help you put together a practical plan tailored to your situation.

What causes genuinely low supply rather than perceived low supply?

True low supply has specific causes: a poor latch or infrequent feeds that do not fully empty the breast, tongue tie affecting transfer, hormonal conditions such as polycystic ovary syndrome, thyroid disorders, or retained placental tissue, previous breast surgery, or hypoplasia (insufficient glandular tissue). If you have addressed feeding frequency and latch and supply is still a concern, a GP or IBCLC can help identify whether an underlying cause is present.

This article is for general information only. Always consult your midwife, health visitor, GP, or a registered lactation consultant for advice about your specific situation.