Hi. I recently felt a lump under my arm and it's probably less than 1cm in diameter when felt. It can't be seen visibly but it feels a little painful when I press it. I don't know what's the cause of it and whether it is due to shaving.
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First Helper blabberlish
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replied July 15th, 2009
Extremely eHealthy
Infected sebaceous cyst under armpit due to shaving feels painful, tender on touch with red and warm overlying skin.
It is very possible that this lump is a swollen lymph node, but because it is less than 1 cm in diameter and it feels tender when only pressed, it suggest lower grade of inflammation.
This swelling can happen even after small, unnoticeable injuries, scratches on the same sided hand and arm.


Best wishes!
Marija
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replied July 15th, 2009
Thanks alot for your reply. But just another query, does that mean I have nothing to worry about and is there anything I can do to get rid of the lump?
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replied March 23rd, 2019
Thank you for asking at Ehealth forum!

I read your question and I understand your concern.
It could be infected cyst or boil. You can take topical antibiotics like mupirocin or fusidic acid.
I hope it helps. Stay in touch with your healthcare provider for further guidance as our answers are just for education and counselling purposes and cannot be an alternative to actual visit to a doctor.
Take care
Khan
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