Hi @gmill123 and welcome to Mayo Clinic Connect. You'll notice that I also added this discussion to the Blood Cancers group: https://connect.mayoclinic.org/group/blood-cancers-disorders/

Am I correct in assuming you are preparing for a stem cell transplant to treat a blood cancer?

I'd like to bring a few members into this discussion who have experience with bone marrow aspiration like @kjjjrader @loribmt @tedwueste @tmvanla and @duttasujata. in fact you may be interested in reading this discussion that @reevesk started:
- Persistent back pain after bone marrow test Persistent back pain after bone marrow test

Gmill, can you describe your pain and where it is? What are able to do to help get pain relief?