i have lumps under my skin that are about the size of a pea on my bicep region they are deep under the skin so they cant be seen but when i pinch the skin i can feel them I found one on my side just above my right hip and one on my right peck the lumps are consitent throughout my upper arm on both arms and can be painful when sqeezed or messed with but unless they r touched i do not notice them my girlfriend was the one who noticed them one night while sqeezing my arm i am conserned it might be cancer i have done a little research and the only thing that has come up is sarcoma is this something i should be concerned about