[Concern] Symptoms of varicose veins

If I walk a lot, I feel a pulling and heavy sensation in my left calf.

And when I sit down and stand up, I don't get up naturally, and sometimes I feel a stiff sensation in my left calf that doesn't stretch well... Is it due to poor blood circulation?

Is it one of the symptoms of varicose veins?

I hurt my leg and couldn't exercise, so I think that's why it's worseㅜㅜ

What are some good exercises for calf muscles?