hollysmom12,
The ligaments about the elbow are very stout and do require significant trauma to tear or rupture them. So, it is probably not any of the ligaments in that area.
There really isn’t much besides muscles and bone in the arm (part from elbow to shoulder), expect for the nerves and blood vessels running through the area. The muscles are bound be fascial sheaths. Their tendons attach the muscle bellies to the bones. Then, you have some subQ tissue and skin. There just isn’t all that much there.
If is very possible that you did strain a muscle belly, which caused some bleeding into the area (thus the “bruising”). The bleeding sets of a small hematoma (collection of blood). To get rid of the hematoma, the body first consolidates and then resorbs it. Sometimes, the consolidation of the hematoma can cause some scar tissue to form. This can tether structures around it, thus causing some pulling when the area is stretched.
But, the only what to deal with the scar tissue, is to stretch it and then rebuild the muscles around it. It is easiest to stretch newly forming scar tissue and somewhat difficult to do it once the scar has matured. But, it is always worth a try.
Physical therapy does not have to be formal in house therapy. Some patients can do the exercises on their own. Usually, one visit to the therapist to learn how to stretch the appropriate muscles and fasical bands, and which muscles to strengthen, is all that is needed. But, the patient does have to be diligent and actually do the therapy on their own. Unfortunately, many patients just do not do the therapy on their own. At the beginning of therapy, there is usually a few days of soreness that then starts to get better. So the patients will try the exercises once or twice, they get a little sore, and they are not cured, so they just give up, not realizing that it often takes weeks to months of concerted effort for the therapy to work. We always tell the athletes; for every day they are out of practice it takes two days to get back.
But, if you do the therapy diligently, and it does not provide significant relief, then you may need an MRI to see if there is anything else going on.
Hope you get to feeling better. Good luck.