I'm a 19 year old female with a lump under my left ear. I've had it a while, I'm not sure exactly how long. I also have under my left underarm something that is dark brown (yes I've made sure it's not a pimple or ingrown hair) it doesn't hurt at all while the lump under my ear does. I'm very concerned one or both of these may be cancerous, am I just over reacting or do I have valid reason for concern? Cancer runs in my family also..