Two days after diving into shallow water and hitting my head, clear watery liquid started coming from my nose and running down my throat. It has lessened from yesterday however; this being three days after the incident. I feel no severe headache (aside from a minor ache in the back left of my head which comes on and off) nor pain when sitting upright, however I do feel slightly lethargic. I have experienced some tinnitus, although I have suffered it far before hitting my head. The scar is atop my nose - right between my eyes.

Is this CFS? Does CFS from trauma go away by itself? Should I seek medical consultation? How would this be treated?

Yes, seek medical attention any time you have clear liquids draining from the nose or ears that is not tears or histamine fluids (allergy like drainage).

The brain needs a solid barrier to protect it from bacteria, etc. Just about any doctor should be able to help. This does not require an ER visit unless an Urgent Care Clinic (doc in the box) is not available.

You might also be interested in the forum dedicated to CSF leaks: http://neurotalk.psychcentral.com/forum78.html