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A member asked:
What is a cyst exactly? i'm not sure that's what this is but it's under my skin in underarm area of right arm, it's hard and pea size
A doctor has provided 1 answer
Cyst is discrete sac: A cyst is a discrete sac-like structure with a membrane around it that separates it from other nearby tissue. Most cysts are not dangerous and can be safely observed. However, if they seem to be growing, are painful or result in bleeding, they should be examined by a surgeon for excision. Once excised, a pathologist will examine it to determine if it is dangerous. Your cyst may be a lymph node.
Answered 1/15/2016
3.2k views
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