Your recurrent painful swollen lymph nodes in the armpit (axillary lymph nodes) that tend to appear after illnesses, last for 1–2 weeks, and then resolve on their own are most commonly consistent with reactive lymphadenopathy, where the lymph nodes temporarily enlarge in response to infections or inflammation. The fact that they previously improved with antibiotics does not necessarily mean a bacterial infection was the cause, as many reactive lymph nodes improve naturally over time. Since the swelling is recurrent, it would be reasonable to discuss this with your doctor, especially if the episodes are becoming more frequent. Evaluation may include a physical examination and, if indicated, blood tests or an ultrasound of the affected area. While the pattern you describe is generally reassuring, you should seek medical attention sooner if the lymph nodes become very large, hard, fixed in place, persist for more than a few weeks, are associated with unexplained weight loss, night sweats, persistent fever, or if new symptoms develop.
Hello
Recurrent painful axillary (underarm) lymph nodes that appear after infections and then resolve within 1–2 weeks are often reactive lymph nodes responding to inflammation or infection. Since they are painful and self-limiting, a serious cause is less likely than if they were painless, progressively enlarging, or persistent.
However, because this has recurred, it would be reasonable to see your doctor for an examination. They may consider blood tests and an ultrasound of the axilla, especially if the nodes are becoming more frequent, larger, or lasting longer than before. Also consider possible local causes such as skin infections, ingrown hairs, shaving irritation, or hidradenitis in the underarm area.
Seek medical attention sooner if a node persists beyond 3–4 weeks, becomes very large, hard or fixed, or if you develop fever, night sweats, unexplained weight loss, or generalized swollen lymph nodes. Based on your description, recurrent reactive lymphadenopathy related to intermittent infections is a possible explanation, but an evaluation is warranted to confirm the cause.
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