Pea sized hard sore lump in arm pit

[Irish Chick]

Hi, I have a small pea sized hard lump under my left arm near the pit, visible to the eye - sore when pressed or tight clothes rub off it, could this be something like an ingrown hair? (there isn't ususally hairs on that part of my armpit) or could it be a cyst? Should I get it checked? 29 yr old female. Thank you.

[scrivvy]

A related discussion, breast was started.

[scared silly]

i started to get pains in my left breast, two small lumps appeared and dissapeared as quick as they came. today i got a sharp pain in my left arm pit and now have a lump the size of a 2 pence piece, its very sore, inflammed and i can only lift my arm to shoulder level. what can this be?

[CCF-RN,MSN-rf]

Dear Irish Chick:  Your description of this sounds like a pimple or ingrown hair.  However, if it does not resolve in a week or two, or becomes worse, have your doctor take a look at it.