Considering that the swelling appeared after a recent viral/cold infection and is soft, tender and painful with arm movement, it is most likely a reactive axillary lymph node responding to the recent infection. Lymph nodes commonly become enlarged and tender during or shortly after infections, and sometimes only one armpit is affected. This is generally reassuring and does not automatically indicate anything serious.
Next Steps
Most infection-related lymph node swellings gradually reduce as the underlying infection settles, often within 1â2 weeks, although some reactive nodes can take several weeks to completely return to their usual size. Avoid repeatedly pressing or massaging the swelling, as this can keep it irritated. If it is increasing in size, becomes red/hot, develops significant pain, or does not start reducing within 1â2 weeks, an in-person examination is advisable to determine whether it is a lymph node or another type of swelling. For better treatment and personalised guidance, you may connect with us at 9 3 1 5 6 6 1 5 6 5 for proper treatment and guidance.
Health Tips
Take adequate rest, maintain good hydration and avoid strenuous activity involving the affected arm until the tenderness improves. You can use a warm compress over the area for comfort. Do not squeeze, puncture or repeatedly check the lump. Seek prompt medical attention if you develop persistent high fever, rapidly increasing swelling, marked redness/warmth, pus, unexplained weight loss or night sweats, or if the lump becomes hard and fixed rather than soft and tender. Thank you