I got kicked in wrist during martial arts. 2nd day tiny bruise formed. 3rd day, red area on whole wrist. burning pain, comes and goes. blood clot??

Less likely: More likely a bruise/hematoma from a sprain. If more concern an X ray will be helpful if a bone fracture is present. Good luck

Not a clot: Trauma to the wrist with discoloration sounds like a fracture. This requires examination by orthopoedist with s rays to determine cause. Sprain is possible but less likely. Suspect your pain is related to using the wrist. Keep wrist in neutral until it can be examined.