My father was recently ill with vomiting, fever, headache. A few days later, his right leg from the knee down to his toes started to swell really bad. He went to his doctor and all he could tell him was that it was some kind of infection and he gave him an antibiotic. It is now a week later and his leg is still swollen and he still looks pale. Is it possible that his illness is connected to his leg swelling and what would have caused it to begin with?

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Male , Age: 62