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A painful lump at 3 a.m., and advice online that contradicts itself. Tick what you're feeling and see which pattern it looks most like, what current guidance says to do at home — which has changed in the last few years — and exactly when it's time to call a doctor instead of waiting.
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Tick everything that fits.
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Your temperature, if you've checked it
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It started…
Since it started, it's…
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These change the answer, so please check each one.
Your answers look most like
This can't tell you what it is — only someone who examines you can. It organises what you've described against current guidance.
They sit on the same spectrum and can blur into each other, which is why they're so easy to confuse. These are the typical patterns — your own may not fit neatly.
| Clogged duct | Mastitis | Engorgement | |
|---|---|---|---|
| Where | One tender spot or lump | An area of one breast, often wedge-shaped | Whole breast, often both |
| Skin | Maybe slightly pink | Red, hot, swollen | Tight, shiny, full |
| How you feel | Fine apart from the sore spot | Often flu-like: aches, chills, tired | Uncomfortable, but usually well |
| Fever | Usually none | Common | Occasionally mild |
| Typical timing | Any time | Often comes on quickly | Usually the first days after birth |
A lot of what's still online is older advice. Here's how current guidance from La Leche League and the NHS compares.
| Older advice | Current guidance | |
|---|---|---|
| Heat or cold? | Hot compresses, hot showers | Cold packs to calm the inflammation |
| Massage | Firm, deep massage to "work the lump out" | No deep massage — only very light touch |
| Feeding | Sometimes: rest the sore side | Keep feeding on cue from both sides |
| Pumping | Pump hard to "empty" the breast | No need to pump extra on top of normal feeds |
Based on: NHS — Mastitis · La Leche League International — Mastitis · Academy of Breastfeeding Medicine Protocol #36, The Mastitis Spectrum (2022). Experts still debate some details, such as how much milk removal is ideal — but all agree on keeping feeding going, avoiding deep massage, resting, and getting seen if you're not improving.
Yes. Mastitis isn't contagious and your milk is safe for your baby. Both the NHS and La Leche League advise continuing to feed, including from the sore side. If feeding directly hurts too much, hand expressing for comfort is an option.
Current guidance favours cold. The NHS suggests a cold compress, such as a cloth soaked in cold water, on the sore area for about 10 minutes at a time. The old advice to use heat is no longer recommended, because the problem is inflammation and swelling.
No. Deep, firm massage can make inflammation worse, and this is one of the points experts agree on. If you touch the area at all, keep it very light.
Keep feeding your baby as normal and don't cut back — but there's no need to add lots of extra pumping on top. Experts still debate the ideal amount of milk removal, so if you're unsure what's right for you, a lactation consultant can help.
Most breastfeeding lumps settle within days. Any lump that is still there after a week or so, or redness that doesn't clear with treatment, should be checked by a doctor. Most turn out to be harmless, but it deserves a proper look.