Leg Swelling Causes Can A Blot Clot In The Leg Cause Swelling?

Can a blot clot in the leg cause swelling? - leg swelling causes

A blood stain was found in my father. He suffers from stomach cancer as well. The leg with the clot was inflated. But now both legs and testicles are swollen. I wonder whether everything that causes swelling of the blood clot may be blocked.