a Movable Lump Under the Armpit: Causes and Concerns - Obstetrics and Gynecology

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A movable lump under the armpit can be concerning, but it is important to understand that not all lumps are indicative of serious health issues. The characteristics you described—a small, round, movable lump that is not painful upon pressure—suggest several possible causes, most of which are benign.

One common cause of a movable lump in the armpit is a lymph node. Lymph nodes are part of the lymphatic system, which plays a crucial role in the immune response. They can become enlarged due to various reasons, including infections (like a cold or skin infection), inflammation, or even benign conditions like cysts. When lymph nodes are reactive, they may swell in response to an infection or inflammation in the body, and they can often be felt as lumps under the skin.

Another possibility is a lipoma, which is a benign tumor made up of fat tissue. Lipomas are typically soft, movable, and painless, and they can occur anywhere in the body, including the armpit. They are generally harmless and do not require treatment unless they become bothersome or painful.

Additionally, sebaceous cysts can also present as movable lumps under the skin. These cysts are filled with a substance called sebum, which is produced by sebaceous glands. They can occur when the glands become blocked and are usually painless unless they become infected.

While the characteristics of the lump you described are reassuring, it is essential to monitor it for any changes. If the lump increases in size, becomes painful, or if you experience other symptoms such as fever, night sweats, or unexplained weight loss, it would be wise to seek medical evaluation. A healthcare provider may perform a physical examination and, if necessary, imaging studies like an ultrasound to further assess the lump. In some cases, a biopsy may be recommended to rule out any malignant conditions.

Given your history of health issues, including a congenital heart defect, it is crucial to maintain regular check-ups with your healthcare provider. They can provide personalized advice and ensure that any new symptoms or changes in your health are appropriately evaluated.

In summary, while a movable lump under the armpit is often benign, it is essential to remain vigilant and consult a healthcare professional if you have any concerns or if the lump changes in any way. Regular monitoring and communication with your healthcare provider are key to managing your health effectively.