Sock marks like tattoos

My legs are so swollen that even after taking off my socks after work, the sock marks seem to last for several hours.

Even if I sit on the toilet and lean my arm on my thigh while looking at my phone for a moment, my thigh gets indented.

I think my swelling is quite severe, and I'm wondering if I should go to the hospital, but then I hesitate, thinking maybe I shouldn't bother the hospital over something like this, so I'm feeling confused and unsure.