Came AWFUL darn close to serious hurt today

Those are the kind of injuries that a diabetic has to really keep an eye on. They can go south in a hurry.

Or non-diabetics. Four years ago, I had a similar scrape. It got worse daily. It turns out there was a hematoma, which got infected. Two weeks later, I went to the hospital, which tried to discharge me after two days of IV antibiotics. I insisted it wasn't better, prompting an ultrasound which revealed the hematoma. After a surgery, the doctor said two more days would have determined if the amputation would have been above or below the knee.
If it gets any worse, don't delay. See a doc.

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