Answered by SecondMedic Expert
General Surgeon · Breast Surgery
Armpit lumps can have various causes, and not all of them are necessarily serious. Some common causes of armpit lumps include:
1. Enlarged Lymph Nodes: One of the most common causes of armpit lumps is the enlargement of lymph nodes in response to infection, injury, or illness. Lymph nodes are part of the immune system and can swell when the body is fighting off infections or inflammation.
2. Infections: Bacterial, viral, or fungal infections in the armpit area, such as folliculitis (hair follicle infection) or cellulitis, can lead to the formation of painful lumps.
3. Abscesses: Pus-filled pockets, known as abscesses, can form in the armpit due to infections or blocked sweat glands.
4. Cysts: Sebaceous cysts, which are noncancerous, fluid-filled sacs, can develop in the armpit. These are often painless but can cause lumps.
5. Allergies: Allergic reactions to certain products, such as deodorants or lotions, can lead to swollen lumps in the armpit.
6. Ingrown Hairs: Ingrown hairs can cause irritation and small lumps in the armpit.
7. Lipomas: Lipomas are noncancerous fatty growths that can form under the skin, leading to palpable lumps.
8. Breast Issues: Conditions like fibrocystic breast changes can cause lumps in the armpit area, as breast tissue extends into the armpit.
9. Skin Conditions: Skin conditions like hidradenitis suppurativa can result in painful, recurring lumps in the armpit.
10. Trauma: Injuries to the armpit, such as blunt force trauma, can cause localized swelling and lumps.
11. Cancer: While less common, armpit lumps can be associated with various types of cancer, including breast cancer and lymphoma. However, most armpit lumps are not cancerous.
It's important to note that the cause of an armpit lump should be evaluated by a healthcare professional, especially if it persists, is painful, or is associated with other concerning symptoms. Diagnostic tests, such as physical examination, imaging, and possibly a biopsy, may be needed to determine the underlying cause of the lump.
