question: 18 yrs old son contacted me to tell me that he has a semi squishy lump on his testicle about the size of a quarter .he noticed it tonight and contacted me. I asked him if he has had an impact in the area,he said he was in a fight a week ago and was hit there . I also know that he is sexually active and is living with a girl. He states that the lump is painful(throbbing) and he is trying to put a cold and warm compress to see which one is better.