Treatment for CSF leak

Possibly. Certainly anything that can be healed by rest, can be aided by acupuncture. And some of the deeper issues, i.e. connective tissue disorders and/or other possible auto-immune/immune issues relationships do well with acupuncture.

That said, the diagnostic tests, as I understand them, wouldn’t be all that risky (just lab testing the drainage and imaging scans) - nor are the blood patch treatments in my opinion - should it come to that.

But under most circumstances I would be doing exactly what you are doing - trying rest, an anti-inflammatory diet, eliminating caffeine, etc. and try a few months of acupuncture along with that.

The caffeine is in fact listed both ways - but in it says "Oral and intravenous administration of caffeine has been recommended as a therapeutic option for post-LP headache, often as an effort to avoid using the more invasive treatment of epidural blood patching. The presumed mechanism is thought to be increased cerebral arterial vasoconstriction, resulting in decreases in cerebral blood inflow and blood volume in the brain. No well-designed, adequately powered, randomized controlled studies have been performed to prove the effectiveness of caffeine. "

To me, it is best avoided due to the fight it creates between the effects of caffeine (vasoconstriction) and adenosine (vasodilation) - most importantly chronic consumption potentially leads to a tolerance towards adenisone. I think on average you want the body to be able to sort out exactly what it needs, not pushing it strongly one way or the other.

That would really be best addressed by your practitioner. There are far too many different approaches in Chinese Medicine to provide a useful answer. But, yes, generally, you are having as a primary focus your true diagnosis in Chinese Medicine terms (i.e. your deeper issues), then local systemic points likely be applied to reduce pressure, etc.