A good latch means your baby takes a large mouthful of breast, not just the nipple, so the nipple reaches the soft area at the back of their mouth. When this happens, feeding is comfortable for you and effective for your baby. The difference between a good latch and a shallow one often comes down to millimeters of positioning, but those millimeters determine whether breastfeeding feels painless or excruciating.
What a Good Latch Looks Like
Several visible signs tell you the latch is working. Your baby’s mouth should be open wide around the breast, covering a large portion of the areola rather than clamping down on just the nipple. More areola will be visible above your baby’s top lip than below the bottom lip, because the lower jaw does most of the work drawing milk out. Your baby’s lips should be flanged outward, like a fish, not tucked in. Their chin presses firmly into your breast, and their nose stays close to (or lightly touches) the breast without being buried in it.
Your baby’s tongue plays a key role you can’t see directly. It should cup under the breast and rhythmically compress the tissue beneath the nipple, squeezing milk from the ducts in the lower areola. When you notice your baby’s ears wiggling slightly during feeding, that’s the jaw and tongue muscles working together, a quiet sign that things are going well.
Where the Nipple Should End Up
The goal is to get your nipple past the hard roof of your baby’s mouth and back to the soft palate. Stanford Medicine describes this target as the midpoint on an imaginary line drawn from the tip of your baby’s nose to their earlobe, deep in the mouth. When the nipple reaches this spot, your baby can compress the breast effectively without grinding the nipple against the hard palate, which is what causes most latch pain.
This is why the latch needs to be asymmetric. Your baby shouldn’t center on the nipple like a bullseye. Instead, their lower jaw should land well below the nipple first, chin leading, so the nipple angles upward and back as they close their mouth. Holding the back of your baby’s head can actually prevent this. Let their head tip back slightly so they can approach the breast chin-first and scoop the nipple into the right position.
What You Should Hear and Feel
A good latch is comfortable. You may feel a strong tugging sensation in the first few seconds, but it should not feel like pinching, biting, or burning. Some tenderness in the early days of breastfeeding is common, but sharp or lasting pain during a feeding usually signals a shallow latch. Research published through the National Institutes of Health found that mothers with nipple trauma from poor latching reported significantly higher pain that interfered with sleep, mood, and daily activity, and that ongoing pain is a major reason people stop breastfeeding earlier than planned.
Sound is one of your best indicators. Once milk starts flowing, a well-latched baby settles into a rhythmic pattern: suck, swallow, breathe, repeated in a steady cycle. Each swallow sounds like a soft gulp, and the exhale after swallowing often makes a quiet “kah” sound. During a strong letdown, this rhythm speeds up to roughly one or two sucks per swallow. If you mostly hear clicking or smacking noises without swallowing, the latch is likely too shallow and your baby isn’t transferring milk efficiently.
Signs Over the First Week
A single feeding can look fine and still leave you wondering whether your baby is getting enough. Diaper output is the most reliable day-to-day measure. By day five, a breastfed newborn should produce at least six wet diapers per day. Stool changes are equally telling: stools shift from black and sticky on day one to greenish by day two, then to yellow, seedy, and thinner by day five. This progression confirms your baby is digesting increasing volumes of milk, which only happens with consistent, effective latching.
Steady weight gain after the initial post-birth dip is another confirmation, though that picture takes a couple of weeks to develop. In the meantime, those diapers are your best real-time feedback.
What a Shallow Latch Looks Like
A shallow latch is essentially the opposite of everything above. Your baby’s mouth covers only the nipple, most of the areola is visible, their chin floats away from the breast, and you feel pain. Because the nipple sits against the hard palate instead of the soft palate, each suck compresses it painfully, and your baby has to work harder to extract less milk. Over time, this can lead to cracked or bleeding nipples, slow weight gain, and frustration for both of you.
If you spot a shallow latch mid-feeding, break the suction by gently sliding a clean finger into the corner of your baby’s mouth. Reposition and try again rather than tolerating pain through the session.
How to Get a Deeper Latch
Start by finding a position where your body is comfortable and well-supported. A breastfeeding pillow or a small stool under your feet can bring your baby to breast height so you’re not hunching forward. Leaning toward your baby instead of bringing them to you is one of the most common setup mistakes, and it pulls the nipple out of alignment.
Line up your baby so their ear, shoulder, and hip form a straight line, with their chest and stomach pressed against your body. Their head should face the breast straight on, not turned to the side. Hold your breast with a C-shaped grip just behind the areola, almost like you’re holding a sandwich. Point the nipple toward your baby’s nose, not directly at their mouth. Wait for a wide-open mouth (you can encourage this by brushing the nipple against their upper lip), then bring them onto the breast quickly, chin first. Their lower lip should land well below the nipple so the breast fills their mouth from the bottom up.
The key move is aiming your baby’s lower lip away from the base of the nipple. This creates the asymmetric latch that sends the nipple to the back of the mouth where it belongs.
Common Reasons Latching Is Difficult
Sometimes technique isn’t the issue. Babies born early may not yet have the muscle coordination to latch deeply. Tongue-tie, where the strip of tissue under the tongue is unusually short or tight, restricts tongue movement and prevents the cupping action needed for effective feeding. Cleft lip or palate affects the seal around the breast. Reflux can make babies pull away or resist feeding. Even sleepiness in the early days can make a newborn too drowsy to open wide enough.
On the parent’s side, flat or inverted nipples can make it harder for the baby to draw the nipple back far enough. Engorgement, when breasts become very full and firm, can flatten the areola and make it difficult for a small mouth to grip. Expressing a little milk by hand before latching can soften the breast enough to make a difference.
If latching remains painful or your baby isn’t producing enough wet diapers after the first few days, a lactation consultant can watch a feeding in real time and spot positioning issues that are nearly impossible to self-diagnose. Many hospitals and WIC programs offer this support at no cost.