Lumps under your armpits can be caused by various medical conditions, including swollen lymph nodes, cysts, or mastitis. If you discover a lump, consult a medical professional promptly. They will conduct tests (such as a biopsy) to determine the underlying cause and recommend appropriate treatment (e.g., antibiotics for infections or surgery for cysts). Alongside medical attention, you can manage symptoms by reducing swelling with cold compresses, relieving pain with over-the-counter medications, and preventing infection through proper hygiene.
