<s>[INST] Hi, I fell a month ago and have a large hard hematoma just below and joining my knee. I have had Xrays, nothing broken, I went to an Orthopedic who diagnosed it as a hematoma. What can I do to reduce the size? Is there any danger of blood clots? Thanks [/INST] Hello,Large hematomas just take a while to resolve. Warm compresses or soaks in a tub of warm water can help. Dangerous blood clots form in the deep veins not in superficial hematomas so that is not a concern. Keep moving, use warm soaks and do not massage the hematoma. Your body will take care of it but it can take months.Regards </s>