help i found a lump

[carebear2154]

hello all i am a owner of a 2 year old boxer his is solid white with a blue eye i love him ,just found a lump on hisside near the tummy its soft and sages alot dosent hurt him it wasnt there lastnight what could it be i am disabled so i cant really afford to take him to the vet unless it is really needed any help i could get a pic if that woulkd help let me know thanks carebear ps.there was a small bump under his rib cage lastnigth at the back near his leg it is bigger today please try to help thanks again