Sore nipples can range from mildly annoying to a sign of something more serious.
Here are the most common causes — and what you can do about them.
Early sign of pregnancy

If there’s a chance you might be pregnant, sore nipples could be one of the first signals.
In early pregnancy, hormonal changes can make the nipple area especially sensitive or painful. Consider taking a pregnancy test if you suspect this could be the case.
Infections may be irritating your nipples

Nipple infections can happen due to a number of reasons. Whether it’s caused by a piercing, trapped moisture, or tight clothing, infections can make the skin itchy and inflamed.
If the discomfort doesn’t go away, your doctor may prescribe antibiotics.
Wrong workout clothes

If your nipples feel sore after exercising, your clothing might be to blame. Movement during workouts can cause fabric to rub against your nipples, leading to irritation.
Wearing a well-fitting sports bra and using a barrier cream can help prevent this.
Allergic reactions

Just like other areas of sensitive skin, nipples can react to allergens.
If you’ve recently changed your laundry detergent or body wash, and soreness followed, you might be experiencing a mild allergic reaction.
Try switching to fragrance-free, gentle products.
Medication

Medication side effects vary – and sore nipples can be one of them. Hormonal medications in particular may impact breast tissue.
Talk to your doctor if you’ve recently started a new prescription and noticed nipple pain.
Breastfeeding

Frequent breastfeeding puts constant stress on the nipple area, often leading to soreness or even cracks in the skin.
A nourishing nipple cream can offer relief. In some cases, consulting a healthcare professional might be necessary.
Hormonal shifts

Do your nipples get sore just before your period? It’s likely due to hormonal changes.
This kind of soreness often peaks in the days leading up to menstruation, but some also experience it during ovulation. It’s a common — and temporary — symptom.
Breast cancer

Although rare, persistent sore nipples can be a symptom of breast cancer, especially when paired with other signs like lumps, nipple discharge, or changes in nipple shape.
If you experience these symptoms, it’s crucial to seek medical attention quickly.
Poorly fitting bras

Wearing a bra that’s too tight or made of synthetic materials can trap heat and moisture, irritating the skin around your nipples.
Look for breathable fabrics like cotton and make sure your bra fits properly to avoid friction and discomfort.
Skin conditions

Chronic skin issues such as eczema or psoriasis can flare up on the nipples, just like any other part of the body.
This might lead to cracking, flaking, and soreness. A dermatologist can help diagnose and manage these conditions effectively.
This article is based on information from Woman.dk.