Hello, Welcom to Healthcaremagic.com. I had gone through your question I can understand your concern. As you said there was no tear only bruise, the swelling under the skin is possibly the hematoma. Because there is infectious tissue under the skin now or infected hematoma that needs to be treated. She must take antibiotics like ofloxin and if there is pain and tenderness too she can also take anti inflammatory medication like Ibuprofen. Yes you must visit to a general surgeon for further evaluation. Hope this is the answer of your query. You can white to us further if you have any question. Regards Dr Muzaffar