When would you consider using occipital nerve blocks to treat episodic cluster headaches?

For many years, it has been known that occipital nerve blocks containing steroids help for a few days in episodic cluster headache. But giving steroids by mouth for 3-5 days also works well and lasts for several days (for migraine attacks, I prefer occipital nerve blocks with local anesthesia and no...

According to AHS guidelines for cluster headache disorder management from 2016, sub-occipital steroid injections are a Level A recommendation with 2 class 1 randomized controlled trials. However, they note that the injection location, volume, components, and frequency may be highly variable, even am...