Hello and thank you for sending your question.
It is possible that you had a small blood clot in a small vein. I would recommend that you continue local therapy to that area which includes warm compresses and take ibuprofen
three times per day for the next 10 days or so. I would suggest that you talk to your doctor about having a repeat ultrasound
performed within the next two weeks to reassess this area.
Thanks again for sending your question.