Plugged ducts (also called clogged ducts) are one of the more common side effects of breastfeeding.

Updated November 2025

Plugged ducts happen to many breastfeeding moms, and while they can be uncomfortable, they are usually temporary and treatable with the right care. If you have noticed a firm, tender lump in your breast or a warm, sore spot that seems to come and go, you are not alone. Studies suggest that around 20 percent of lactating parents experience a plugged duct at some point.

Below, we break down everything you need to know about plugged ducts, including why they happen, how to relieve them at home, and when it is time to call your provider.

TL;DR

A plugged duct is caused by milk that is not draining well from part of the breast. It often appears as a small, painful lump or a warm area of swelling. To clear it, continue feeding or pumping, try new nursing positions, use cold packs, avoid tight clothing, and gently massage with a warm shower or vibration. If the lump does not improve in 12 hours or you develop fever, chills, or redness, contact your provider because it may be turning into mastitis.

Shallow latch. Your baby may not be removing milk effectively
Skipped or delayed feeds. Long stretches between pumping or nursing increases milk buildup
Consistent pressure on one area. Sleeping on your stomach or tight clothing can compress ducts
Feeding in the same position each time. This may prevent full drainage
Oversupply. More milk than your baby needs can overwhelm the ducts
Ill-fitting pump flange. A flange that is too large or too small can reduce milk flow. See our flange sizing guide for more information

Sometimes, a plugged duct can be accompanied by a milk blister (also called a bleb), although the two do not always occur together.

Symptoms of a Plugged Duct

A plugged duct can feel different for everyone, but the most common symptoms include:

A tender lump that moves slightly when pressed
Pain before feeding or pumping
Decreased milk flow on one side
Slight redness
Localized warmth

Note: A plugged duct should not cause full-body symptoms like fever. If that happens, it may be developing into mastitis.

How To Treat a Plugged Duct at Home

The good news is that most plugged ducts clear within 12 to 48 hours. Here are the most effective ways to get relief.

Keep Feeding or Pumping

Continue nursing or pumping on the affected side to keep milk moving. Do not avoid feeding on that breast.

Check Your Baby’s Latch

A deeper latch helps remove milk more effectively. A lactation consultant can help if you are unsure what to look for.

Try New Nursing Positions

Aim your baby’s chin toward the plug since that area receives the most suction and drainage.
Try:
• Football hold
• Side-lying
• Cross-cradle
• Leaning over slightly so gravity assists drainage

Use Cold Packs After Feeding

Cold reduces inflammation. Place a cold pack or ice pack on the sore area for 10 to 15 minutes after a feed.

Use Gentle Vibration

A soft vibrating massager can help loosen the plug. Use only light pressure.

Warmth Before Feeding

Warmth increases circulation. You can try:
• A warm shower
• A warm compress before nursing
• Hand expressing in the shower

Avoid Tight Clothing

Skip underwire bras, restrictive tops, or anything that compresses the breast.

Let Your Skin Breathe

Go braless or topless when you can to keep the breast dry and reduce irritation.

Keep Bras and Tanks Clean

Wash your nursing bras regularly to prevent bacteria buildup that may worsen inflammation.

What Not To Do

To keep your breast healthy and prevent complications, avoid the following:

Do not massage aggressively. This can worsen inflammation.
Do not apply heat all day long. Warmth should be brief and only before feeding.
Do not skip feeds.
Do not stop breastfeeding on the affected side.
Do not press or pinch your nipple to “push the plug out.”

When To Call Your Provider

A plugged duct should begin improving in about 12 hours. If symptoms do not improve, infection may be developing.

Pain or swelling does not get better within 12 hours.
You develop a fever above 100 degrees Fahrenheit.
You notice spreading redness.
You feel flu-like symptoms.
Plugged ducts are recurring.
You want to safely take lecithin supplements.
You need help with latch or positioning.
Early intervention can prevent mastitis and other complications

FAQs About Plugged Ducts

What does a plugged duct feel like?

A plugged duct feels like a tender, firm lump or a painful warm spot on the breast. Pain usually increases before feeding.

Can I keep breastfeeding with a plugged duct?

Yes. Continuing to breastfeed or pump is one of the best ways to clear the plug.

Do plugged ducts always lead to mastitis?

No, but they can if not treated early. Monitor symptoms and act quickly.

Can pumping cause plugged ducts?

It can if your flange size is not correct or if your pumping schedule is inconsistent.

Does lecithin help plugged ducts?

Many moms use lecithin to prevent recurring plugs, but always check with your provider first.

Can stress cause plugged ducts?

Stress does not directly cause plugs, but it can impact letdown, which may reduce milk flow.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900741/

The content provided here is for informational purposes only and is not intended to replace the advice of medical professionals. It should not be used to diagnose or treat medical conditions or problems. Please contact your healthcare provider with questions or concerns.