Severe left leg vein pain

I previously had a health checkup at a university hospital, but I was told everything was fine and I left it at that. Now, I'm older and have gained weight.

It seems like my veins are not doing well...

I haven't been taking the medication...

I heard that it costs around 900 when I called for consultation.

I don't even have the courage... It seems health insurance isn't working either...

The ultrasound examination costs 150,000 won.

Where should I go? To internal medicine or somewhere else?

Is it a chronic disease? Or is it a cardiology issue?

Every day, I am overwhelmed with worries...