A feeling of liquid beneath a large bruise is an indication of what?

Could be hematoma: A bad bruise could lead to a collection of blood beneath the skin which would feel like a fluid collection.

It could be...: A hematoma, or a collection of blood between the tissue layers. You would be well advised to see a doctor for further recommendations.

Hematoma: The blood resorbs slowly leaving a seroma. All benign, just needs to absorb and clear.

You have: Contused the area. This results in fluid build up. Need to protect the area so it won't break down. With time this shld absorb. Any questions see a wound doctor.