I had a very large bite bruise on my inner thigh and about two or three days afterward it sort of spread and seemed to ooze downward into an upside down teardrop shape. The same thing happened once when I fell at work and banged my upper arm on the edge of a counter.

This has only happened twice so I'm not sure what to think about it and I was wondering why it happens? Does it have something to do with the amount of blood under the skin or gravity or...?