If your nipple turns white, then blue, then red after feeding — with burning or throbbing pain — you may have nipple vasospasm, not thrush. The two look similar but are treated differently.
The key thing this guide does: it describes what nipple vasospasm actually looks like, because many women who have it have been told — sometimes repeatedly — that they have thrush. They don't. And antifungal treatment for vasospasm doesn't work, and can make it worse.
Nipple vasospasm is when the blood vessels inside the nipple suddenly constrict, cutting off blood flow. It happens most often immediately after a feed, when the warm wet nipple is suddenly exposed to cooler air — the temperature drop triggers the spasm.
What you see: the nipple — or the tip of it — turns white. This is the telltale sign. The colour then transitions as blood returns: white → blue or purple → red, often accompanied by a burning, throbbing, or stabbing pain that can last anywhere from seconds to over half an hour.
Thrush also causes burning nipple pain. It does not cause colour changes. If your nipple is turning white, you almost certainly do not have thrush. The two are frequently confused — the GP Infant Feeding Network explicitly describes vasospasm as 'under-recognised and frequently misdiagnosed as thrush.' If you've been treated for thrush and it hasn't helped, vasospasm is worth knowing about.
Vasospasm of the nipple is often a manifestation of Raynaud's phenomenon — the same condition that causes fingers and toes to turn white in the cold. Raynaud's affects up to 20% of women of childbearing age, and breastfeeding is one of the contexts in which it manifests.
If you've ever noticed your fingers going white or intensely cold, or if anyone in your family has Raynaud's, you are more likely to experience nipple vasospasm while breastfeeding.
The triggers are consistent: cold air (especially stepping out of the shower, going outside in winter, or the baby unlatching), stress, nicotine, and caffeine all make it worse. The immediate management follows directly from this: cover the nipple instantly when the baby comes off. Warm breast pads, a cloth held against the nipple, or even just pressing your hand over it can stop a spasm from developing or shorten its duration.
Nipple vasospasm has two main causes: Raynaud's phenomenon (which exists independently of breastfeeding), and nipple trauma from a suboptimal latch. A shallow latch compresses the nipple, damages the tissue, and triggers vasospasm as a secondary response to injury. This is sometimes called 'blanching' rather than true vasospasm, but the experience and management are similar.
If you are experiencing this in the early weeks of breastfeeding, a latch and positioning assessment by an IBCLC (International Board Certified Lactation Consultant) or a breastfeeding specialist midwife should be your first step. Many cases of vasospasm resolve entirely once the latch is corrected — the vasospasm was a symptom of the trauma, not an independent condition.
Signs of a latch-related cause: vasospasm happens during or immediately after the feed; your nipple comes out misshapen (pointed or ridged like a new lipstick); you have nipple damage. Signs of Raynaud's-related cause: it happens at other times too, not just during feeding; it affects both nipples; it's triggered by cold even away from feeding.
Nifedipine is a calcium channel blocker prescribed for blood pressure that also treats Raynaud's phenomenon. It has an excellent safety record in breastfeeding — it is considered compatible with breastfeeding by the Breastfeeding Network — and it works specifically by relaxing the blood vessels that cause vasospasm.
The usual approach in the UK is nifedipine 10mg three times daily (or 30mg modified release once daily) for two weeks. This is often sufficient to break the cycle. Some women need longer treatment, particularly those with established Raynaud's.
Your GP can prescribe this. The relevant clinical guidance is in the NHS BNSSG prescribing guidance and the GP Infant Feeding Network clinical pages — you can cite these if your GP is unfamiliar. The Breastfeeding Network helpline (0300 100 0210) can also advise and support you in having this conversation with your GP.
One of the reasons vasospasm stays underdiscussed is that it often develops after an initially smooth breastfeeding start — sometimes weeks or months in, sometimes triggered by a cold, a period of stress, or a single episode of nipple damage (a bite, a poor latch during a growth spurt). Women assume something has gone wrong with the feeding itself when the actual issue is vascular.
It can also affect women using breast pumps — an incorrectly fitted pump flange causes the same compressive trauma as a shallow latch and can trigger vasospasm in women who pump regularly or exclusively. Check your flange size: the nipple should move freely in the tunnel with minimal areola being pulled in.
The outlook is genuinely good. Vasospasm that is correctly identified and managed — through latch improvement, warmth strategies, and nifedipine if needed — resolves well. Many women who were on the verge of stopping breastfeeding because of this pain go on to feed for many months once it is properly treated.