I fell 6 days ago landing on my forearm by my elbow. it bruised significantly. now it is a burning pain w/ a lump by the bruise. hand numb at times?

Nerve Entrapment: If this doesn't resolve after a few days, consider seeing a sports medicine doctor or physiatrist to see if there is any testing needed to be done regarding that burning pain and hand numbness issue.

Ulnar nerve: There is a nerve right by the elbow-the ulnar nerve that can be injured. The bruise itself may be a hematoma that can cause pressure or irritation of the nerve. That should get better over time. Numbness going into the 4th and 5th fingers would be indicative of injury/irritation of the ulnar nerve. The natural history is that it should get better over a few weeks. If not, see your doctor.