Hi
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A small pea size lump can be a neurofibroma (localized collection of nerve and fibrous tissue), a varicose vein, an outpouching of bursa or even a lipoma. Consult your PCP for an evaluation.
Hope this helps. Take care!
it is possible just a little fat pocket. if it is like a little ball as you say, and doesnt hurt but you can move it around, it is possibly just this, most unlikely to be cancer but if you are worried get it checked.