A small bump on foreskin?

hi. im 15 years old and i noticed a small bal like lump in my foreskin yesterday. it feels like its in my foreskin not on it and its quite hard and is just smaller than the size of a pea. im only 15 so its very unlikely that its cancer but im quite worried in case it is. if you have had one could you please tell me what it is because im getting quite worried. thanks.