Reading here https://www.ncbi.nlm.nih.gov/m/pubmed/3034083/ beta endorphin is released during brain hemorrhage. I would assume synthetic opiates like oxycodone would agonise the receptor that the released endorphin during brain hemorrhage normally would be agonising. Assuming that, I could say that oxycodone would be beneficial.
Update: just made some poppy seed tea. My pain is down to a lower number and not a 6 anymore, which means I can concentrate on other things besides the tongue pain. However, my brain is still hemorrhaging the opiate doesn't help that, and it might be making it worse. I wonder if a semi synthetic pill like oxycodone, instead of codeine and morphine would be a better euphoriant for the dysphoria I feel inside from hurting piercings. Also I wonder if the poppy seed tea is adding to the hemorrhaging because of excess body fluids being pressurized into my body for later expelling. I bet a semi synthetic like oxycodone would be the best, maybe oxymorphone? Maybe if I make the poppy seed tea into a resin to take as a pill, that might help. However, I am not going to do that because it would get expensive and might be becoming illegal. However poppy seed tea remains legal. Hopefully a doctor can help.