Mastitis: Symptoms, Prevention, and Treatment

May. 25, 2025 | 6 min read

Annabella Team
Topics & Categories: Milk Our Knowledge

Breastfeeding is often described as natural, but that does not mean it always comes easily. Like many parts of motherhood, it involves learning, adjusting, and sometimes facing unexpected challenges. One of these challenges is mastitis. If you have ever found yourself with a sore, swollen breast and a sudden wave of exhaustion or fever, you may have already met it. This guide is here to help you understand what mastitis is, how to recognize it, how to reduce your risk, and how to care for yourself if it appears.

What Is Mastitis?

Mastitis is an inflammation of breast tissue that often happens during breastfeeding. It usually starts when milk does not drain well from the breast. This can cause a blockage or build-up, which leads to swelling and pain. If bacteria enter through a cracked nipple or irritated skin, the inflammation can develop into an infection.

Mastitis most often appears in the first few weeks after birth, but it can happen at any point during your breastfeeding journey. It may follow skipped feedings, a change in your baby’s routine, or just a period when you are feeling extra tired or run down.

How Mastitis Develops

At the root of mastitis is milk that remains in the breast instead of flowing out. This can happen for a number of reasons:

  • Your baby has a shallow latch and is not draining the breast well.
  • You delay or skip feedings, either by choice or due to life getting in the way.
  • You have an oversupply, and the breasts are not emptying fully.
  • Your breast is under pressure from a tight bra, a sleeping position, or a baby carrier.

When these situations combine with fatigue, stress, or cracked skin, the risk of inflammation and infection increases.

Symptoms to Watch For

Breastfeeding discomfort is common, but mastitis is something different. It usually comes on quickly and affects just one breast. You might notice:

  • A swollen, hard, or warm area that is painful to touch
  • Redness, sometimes in a wedge or patch shape
  • A burning or throbbing feeling during or after feeding
  • Fever, chills, or body aches that feel like the flu

Some mothers say it feels like being hit by a wave of exhaustion. Others describe it as a sudden sharp shift from regular soreness to something more intense. If these symptoms appear, it is worth checking in with a healthcare provider, especially if you feel unwell overall.

 

Preventing Mastitis

While mastitis is common and can happen even with the best care, there are practical steps you can take to lower the chances of it developing. These habits support healthy milk flow, reduce stress on breast tissue, and help your body stay resilient during the demands of early motherhood. Incorporating a few small changes into your routine may make a big difference over time. Here are some ways to reduce your risk:

  • Feed frequently and respond to your baby’s cues. Try not to let your breasts become overly full. If your baby sleeps longer than usual or skips a feeding, express a small amount of milk to relieve pressure and maintain flow.
  • Pay attention to your baby’s latch. A deep, well-positioned latch helps remove milk effectively and reduces nipple irritation. If you are unsure about the latch, a lactation consultant can offer helpful adjustments.
  • Change feeding positions from time to time. Different nursing positions help drain different areas of the breast. Switching things up can prevent milk from pooling in one spot.
  • Avoid constant pressure on your breasts. Tight bras, baby carriers, or certain sleeping positions can place pressure on your milk ducts. Try to keep your chest comfortably supported but not compressed.
  • Care for your nipples. Keep the area clean and dry between feeds, and use a safe nipple cream if your skin becomes cracked or dry. Healthy skin helps block bacteria from entering.
  • Rest and nourish your body. Your immune system functions best when you are rested, hydrated, and eating well. Even short breaks and small meals can help your body stay strong.

What to Do if You Think You Have Mastitis

If you start to feel the early signs of mastitis, there are a few simple steps you can take right away that may help ease symptoms and prevent things from getting worse. Applying a warm compress to the sore area before feeding can help open the milk ducts and reduce discomfort. You can use a warm cloth or a heating pad for this. Gentle massage is also helpful—try using your fingertips to massage the area toward the nipple during or after feeds to encourage milk flow and clear any blockages.

It is important to keep the milk moving, even if it feels uncomfortable. Continue breastfeeding or expressing milk from the affected side, as this helps with healing. If feeding is too painful, try expressing milk slowly and gently. At the same time, allow your body to rest and stay well hydrated. Ask for help if you can, and try to make rest a priority for a day or two. If your symptoms improve within 24 to 48 hours, these home measures may be enough. But if the pain or swelling continues, or if you feel worse, it is important to speak with your healthcare provider without delay.

When to Seek Medical Help

Mastitis caused by infection may require antibiotics. Contact your doctor if:

  • You have a fever over 38.5°C (101.3°F)
  • The pain becomes severe or constant
  • The redness spreads or you see pus or discharge
  • You notice a hard lump that does not go away after feeding

If an abscess develops, it may need to be drained. This is not common, but it is another reason not to wait too long before asking for help. Early care usually leads to a quicker and smoother recovery.

If antibiotics are prescribed, be sure to take the full course. Even if you start feeling better, stopping treatment early can allow the infection to return.

Is It Safe to Keep Breastfeeding?

In most cases, yes. Continuing to breastfeed is not only safe but also helpful. It keeps the milk moving and supports healing. Your baby can safely drink milk from the affected breast, even if you are taking antibiotics that are approved for use while nursing.

If breastfeeding is too painful, gentle expression is an option until you are able to resume feeding comfortably. The key is to keep the milk flowing, so your breast does not become more engorged.

What Happens After Mastitis?

For many mothers, mastitis is a one-time issue. With early treatment and supportive care, symptoms usually clear up quickly. That said, some mothers do experience repeat episodes. If this happens, it may be helpful to revisit your feeding routine, baby’s latch, or stress levels to see if something can be adjusted.

If you are worried about future occurrences, speak with a lactation consultant or doctor. They can help you identify patterns or habits that may be contributing.

A Final Word

Mastitis is difficult, especially when you are already giving so much of yourself to your baby. It can feel sudden, overwhelming, and discouraging. But it is also manageable, and it does not mean you are doing anything wrong. You are learning, adjusting, and doing your best.

Remember to trust your body and your instincts. If something feels off, speak up. Ask for help. You are not expected to push through pain or exhaustion alone. Caring for yourself is part of caring for your baby.

You are doing a good job, even on the hard days.

 

 

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