Both of my ankles are throbbing and the veins are apparent?

I've had aching ankles for about 3 days now, just now I noticed that my veins are more apparent and my heels are throbbing. I'm not overweight, so I don't think gout is an issue, also move around a lot. I don't know why they're all of a sudden hurting me, maybe it's stress? What do you guys think? Thanks :)