I don't want nothing to have to do with something implanted in my body

Remember... no question is a stupid question.

I am ok with my meds right now i just moved up to some ledvo I have added THC which decreases my pain quite a bit. The TCH also relieved my blood pressure back to very near regular. That really surprised me. Plus 4 to 5 hrs of very deep sleep really helps me quite a bit.

Never heard of a pump, how does it work?