I am 28 weeks pregnant and have some varicose veins in my right leg (only). Did not have them before pregnancy. I did have some spider veins before and the small patch I had on my right knee has become a lot bigger and denser over the last few months. It looks very much like a big purple bruise when I stand up and fades away, almost disappears when I put my leg up. it also feels very warm to the touch and aslo cools down when I put my legs up. Are they regular spider veins or something more serious? Thanks in advance.