A member asked:

If a cyst is painless does that mean it isn't infected? would it cause a nearby lymph node to swell? i'm 18 with a cyst and swollen node in armpit.

3 doctors weighed in across 3 answers
Dr. Donald Colantino answered

Specializes in Internal Medicine

An infected cyst appears reddened, May drain pus, and is usually tender as inflammation is a prominent feature of infection. It may not ache but it is tender to touch. Infection and inflammation do cause regional lymph nodes to react.

Answered Aug 18, 2014

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Dr. Gehrig Harris answered

Specializes in Family Medicine

A painless cyst can still be infected and it could also cause a nearby lymph node to swell. I would have it looked at by a doctor to see if it is something that needs treatment. Good luck :)

Answered Sep 28, 2016

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Dr. Laura Martin answered

Specializes in Family Medicine

infection generally hurts, gets red and swollen. cysts can be very large with no infection just see them. No nearby lymph nodes should not swell, this is concerning and should be checked b your doctor, even young people can sometimes need medical care

Answered Sep 16, 2015

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