There can be many causes of the swelling in your left foot and ankle.
You could have problems with the venous valves in your legs.
You could have issues with the return of lymph fluid up your legs.
There might be injury/inflammation in your foot/leg/ankle etc that causes the swelling
You might have a blood clot.....
It could be related to your heart issues.
So. How do you figure out what is causing this swelling?
This is not something you are going to be able to deal with at home.
I suggest you discuss and show the swelling to your doctor and see what she has to say. Hopefully the cause is something simple that can be easily addressed.
Does this make sense to you?
I am happy to be able to help you today. If you would be so kind, please help me get credit for my efforts in answering your questions and press the excellent feedback button for this encounter. And, don’t forget, I work for tips. I would also be happy to continue to answer any more questions you have until we have resolved your concern.
Dr. Rick MD FACS