1 doctor weighed in:

I am a 21 year old female and have a lump under the skin on my arm pit does not hurt and cannot see it but can feel it can you tell me what it can be?

1 doctor weighed in
Dr. Erik Borncamp
Wound care

In brief: Deep or superficial?

If its up in the skin and moveable it is most likely just a skin cyst.
If it is deeper in the armpit between the muscles it may be an inflamed lymph node or fatty tumor. These can feel like a grape deep under the skin. If you are unsure, have an md look at it. If it persists longer than a couple months or begins to grow have it seen right away -- at your age it is most likely benign.

In brief: Deep or superficial?

If its up in the skin and moveable it is most likely just a skin cyst.
If it is deeper in the armpit between the muscles it may be an inflamed lymph node or fatty tumor. These can feel like a grape deep under the skin. If you are unsure, have an md look at it. If it persists longer than a couple months or begins to grow have it seen right away -- at your age it is most likely benign.
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