I am a 54 year old female, 5 foot and weigh about 145 pounds. I have a very large knot on my lower left leg about 3" long. It doesn't hurt but it feels very hard. There is no bruising. I also have a lot of problem with swelling and holding water in my legs. When I cross my legs indian style, there is some pain in my left knee area, but I'm not sure it that is related. I'm wondering what type of doctor I should see for this.