I have vericose veins in my leg above my knee a large bruise appeared above one could it be a blood clot? what do i do?

Bruise: observe it for now . If it gets painful or swollen get a ultrasound Duplex scan to rule out a deep blood clot

Exam: You are describing a superficial varicosity ( vein near the surface) which has been injured or bled. This usually resolves spontaneously over the next 7-10 days. If painful, red or swollen get examined this week. If this has occurred within the last 2 days: NO HEAT- it will only make it spread. OK to use local ice and Advil{ if not allergic)- Call for an appointment if painful or red.