Swollen veins while swimming

[Beink1956]

Hey buddies! Happy to be a part of this forum. I love swimming. But now I am not able to swim properly due to knee pain. My legs become numb while swimming and I am unable to move a muscle during that time. I could see the veins swollen up. My trainer said it could be varicose vein and advised me to undergo a varicose vein treatment in Vaughan as soon as possible. While researching, I came across thrombophlebitis which describes similar symptoms. I am confused now. Anyone here has similar symptoms?