Blocked milk duct

Overview

A blocked milk duct is a small, tender lump that forms when one of the milk ducts in your breast becomes clogged. It can cause pain and swelling, but it is not harmful to you or your baby.

Yes, blocked milk ducts are very common, especially in the first few weeks of breastfeeding.

It mainly affects breastfeeding mothers, but can sometimes occur in women who are not breastfeeding or rarely in men.

Symptoms

Common symptoms

• A small, firm, tender lump in one breast
• Redness or warmth over the lump
• Pain or discomfort when breastfeeding

Causes

Main causes

• Milk not draining completely from the breast
• Pressure on the breast (e.g., tight bra, sleeping on stomach)
• Infrequent feeding or skipped feedings

Risk factors

• Using only one breastfeeding position
• Overproduction of milk
• Nipple damage or cracks

When to see a doctor

See a doctor urgently if:

• If you have a high fever or feel very unwell
• If the lump becomes red, hot, and swollen rapidly

Book a routine appointment if:

• If the lump persists after trying self-care for 1-2 days
• If you have recurrent blocked ducts

Diagnosis

A healthcare provider will ask about your symptoms and examine your breast. They can usually diagnose a blocked milk duct based on the lump and tenderness.

Tests that may be done

• Physical exam is usually enough
• If mastitis is suspected, your provider may take a small sample of breast milk to test for infection

What to expect at your appointment

The examination is gentle and quick. You may be asked to breastfeed or express milk to see how the duct behaves.

Treatment

Treatment focuses on relieving the blockage and preventing infection. Most cases can be managed at home.

Self-care at home

• Continue breastfeeding or pumping from the affected breast – this helps clear the duct
• Apply a warm compress to the lump for 10-15 minutes before feeding
• Gently massage the lump toward the nipple while feeding
• Ask your pharmacist or healthcare provider about pain relief that is safe during breastfeeding

Medical treatments

If self-care is not enough, your doctor may prescribe antibiotics if an infection is present. They may also recommend continued feeding and might refer you to a lactation consultant.

When is surgery considered?

Surgery is rarely needed. If a breast abscess (a pocket of pus) develops, it may need to be drained by a healthcare professional.

Living with this condition

You can continue your normal activities while managing a blocked duct. The key is to keep breastfeeding or expressing milk regularly to prevent further blockages.

Lifestyle tips

• Avoid tight clothing or bras
• Try different breastfeeding positions
• Ensure your baby latches well

Diet and exercise

No special diet is needed. Staying well-hydrated and eating a balanced diet supports overall health. Gentle exercise is fine.

Mental health and emotional wellbeing

Dealing with a painful breast can be stressful, especially when caring for a new baby. It is important to seek support if you feel overwhelmed. Remember to take care of your emotional health too. If you are in crisis, please contact a mental health helpline or emergency services.

Prevention

While not always preventable, you can reduce the risk by feeding frequently, ensuring a good latch, and avoiding pressure on the breasts.

Complications

If left untreated

• Mastitis (inflammation and infection of the breast)
• Breast abscess (collection of pus) requiring drainage

Long-term outlook

With proper care, most blocked ducts resolve within a few days. Even if it progresses, treatment is very effective and you can fully recover. Continuing breastfeeding is safe and encouraged.

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