Lump

I'm 20 years old and have had two pea sized lumps on my testicles for about the last 4-5 years. (One on each testicle). I have never felt pain or any other symptoms but I have not got them ever checked out. If I were to squeeze the lumps they would hurt but other than that they are painless. Has anybody got any recommendations about what to do or what they think they could be? Thanks very much