If you notice a rash on your breast, it can be concerning, but it's often due to common issues like infections or skin conditions. Here are some possible causes and treatments: **Infections**: Mastitis is an infection of the breast tissue, common in nursing women. Symptoms include redness, swelling, and pain. Treatment usually involves antibiotics. **Skin Conditions**: - **Hives**: Itchy welts caused by allergies. - **Psoriasis**: Scaly, itchy patches due to an overactive immune system. - **Scabies**: Itchy bumps caused by mite bites. - **Shingles**: Painful, itchy blisters from the chickenpox virus. - **Intertrigo**: Rash from skin rubbing together, often under the breast. - **Yeast Infection**: Itchy rash from Candida fungus, treatable with antifungal creams. - **Nipple Eczema**: Rash around nipples, often in nursing women. - **Acanthosis Nigricans**: Dark, velvety spots, sometimes a sign of prediabetes. - **Heat Rash**: Prickly, itchy rash from sweat. **Cancer**: Rarely, a rash can be a sign of inflammatory breast cancer or Paget’s disease. Symptoms include redness, swelling, and sometimes discharge or bleeding from the nipple. **When to See a Doctor**: If your rash is accompanied by severe symptoms like persistent pain, swelling, or discharge, see a doctor. They may recommend a mammogram or biopsy to determine the cause. **Prevention**: - For mastitis: Keep breastfeeding, empty breasts fully, stay hydrated, and rest. - For intertrigo and yeast infections: Keep the area dry and clean. - For heat rash: Avoid excessive sweating and wear breathable fabrics. Most breast rashes are not serious, but it's important to monitor your symptoms and seek medical advice if needed.