The very fact you said there is oedema makes everyone lift their eye brows and it's bothering too - In the natural course of the type of the injury
, this must not happen to have edema of brain; first you need to define where's the edema ? isn't cerebral or local edema? if it's local, it's a part of inflammatory response only which you don't need to bother at all- make sure you don't ave any fracture
of your skull bone. cerebral edema
can be diagnosed only by neuro-imaging.