Is there any risk of disease if long purple streaks form on your inner thighs?

yah i have the same problem, I have long purple streaks on my inner thigh that have seemed to be moving along my thigh and growing larger, would this be like stretchmarks, or maybe something more serious? I too, have this problem, its what brought me to the site. can anyone help me ... mine are notheing like veins or anyting ... there more like stretch marks. thx in andvance (P.S. I'm male)