Found a firm mobile pea-sized lump under skin near elbow on left forearm. now found one near elbow on upper arm, and one 1/2 way up back right bicep.

Mass: You will need to follow up with your family physician to evaluate. There could also be need a need for a General Surgery referral for biopsy of the pea size masses. But because you are giving me limited information ( I do not know the consistency or shape or color), it is best that you follow up with a physician so they can do the necessary tests and visual assessment.