Lump under armpit

My sister noticed a small lump under her armpit several months ago. She had her doc look at it, she felt it and said its a cyst. That was that. Now last night, it started becoming painful, and she felt it and she said it was larger. Its under her skin inside. Anyone ever have this? Shes nervous its cancer, but I read cancer lumps under the armpit are typically painless. She is calling a dermatologist in the morning to have it either looked at or biopsied. Any experience with this?

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Zaphod42 · 51-55, M

I’ve had a few lumps in my pits over the years. Most are just sore for a few days to a couple weeks and then go away. Some have gotten a little more boilish…not fun…but they still went away eventually. I suspect your sister will be just fine before much longer.

Coralmist · 41-45, F

@Zaphod42 Thanks friend. Because it was small and now is larger she will call the doc to check it out, but hopefully its what you had..ty🌺