In what situation do you use nerve blocks in patients with headache?

Great resource: Blumenfeld et al., PMID 23406160.

Times that I personally consider nerve blocks:

1) Headache management during pregnancy, but with lidocaine nerve blocks

2) Migraine especially if significant allodynia

3) Occipital neuralgia

4) Trigeminal autonomic cephalgia including cluster headache as a bridging treatment to help shorten the cluster period. In this case, I will include steroids in the occipital nerve block

5) Cervicogenic headache and/or myofascial pain (combo of nerve blocks + trigger points). This often co-exists with migraine, and in patients with hypermobility (like hypermobile EDS), I find adding these to migraine treatment is particularly beneficial

7) Elderly patients not tolerating oral medications

8) Option to help st...