<s>[INST] Hello my name is frank Im 23 years old. I have a red/purple lump on my stomach. Sticks out almost as big as a marble. Its like discolored with red and purple. Doesnt hurt at all. I cant really think of any side effects whats so ever. Maybe that when I sit down and drive for too long I have pain in my testicles but Im have no idea if its due to the lump. Ive had this lump for so long Im just scared to see a doctor Im afraid of what they might say. Like cancer or anything serious. Like I said its red and purple about the size of a marble. Any IDE what this could be? Doesnt hurt at all if I touch it or push it. Its been about 3 year I think Ive had it. Thank you very much! [/INST] Hi and welcome to Chat Doctor. If this is there for 3 years the nit won't be malignant. It sounds to me like haemangioma or any other subcutaneous lesion such as lipoma, fibroma or cyst. It can be surgically removed.  Pain in testicles shouldn't be related to it. It can result from hernia or infection including STD. You can do ultrasounds of both to evaluate the exact diagnosis. Wish you good health. </s>