What Causes Swelling In Ankle And Lower Leg Post Hernia Surgery?

Hello - I had hernia surgery last month. It was outpatient. Surgeon found 3 hernias on the left side. All went well and have been recovering. However, when I returned for my post operation appointment I told the surgeon about my left lower part of my leg and ankle was really swollen. She told me to elevate it and put hot and cold compress. I still have the problem. Have contacted my primary doctor and have an appointment to see him in 2 weeks. I am taking thyroid and high blood pressure medication. My left side above my thigh is still numb. Can you answer as to what you might think it is? Thank you. Olga