The patient: A 37-year-old woman in Philadelphia
The symptoms: The patient went to the emergency department after four days of pain, swelling, and bruising on the upper part of her left knee. She reported that these symptoms appeared after she’d used a massage gun on her leg.
What happened next: Doctors took the woman’s medical history, noting that she had been on blood thinners for about six years due to previously having a blood clot in her lung and a stroke caused by a small birth defect in her heart that had allowed a clot to reach her brain. She also reported heavy menstrual bleeding.
Dispatches From The Front 