Hi Dragunfly,
I am just seeing this now, but I thought I would reply so others with the same question may see the answers I have heard from others (and experienced myself):
Question 1)
In terms of pain, is it comparable to trigger points or occipital nerve blocks?
I personally haven't had nerve block injections, but I've heard from those who've had both nerve blocks and botox, that Botox is less painful. Personally I have found with Botox injections that most of the injections are like small pin pricks, and maybe 2-3 are more painful if they're in a more tender area, but that the pain is short lived (a few seconds at most). I am sore for the rest of the day, and fine the next day.
Question 2)
Will I have any swelling, bruising, or God Forbid, a headache from it?
I have had minor bruising occasionally, but not all over. For example, I may be bruised or slightly (not visibly) swollen in a spot or two. Once in awhile I get a migraine, but that could have likely occurred anyway!
Side effects can vary from person to person, and it is always good to talk to your doctor about possible side effects, especially ones that you are most worried about.
If you like, you can read more about my personal experience with Botox:
https://migraine.com/blog/botox-experiment/
You can also search the site for Botox, there's a wealth of information:
https://migraine.com/?s=botox&submit=Go
Please let us know how you made out!
Be well,
Lisa