Here is a short list of some of the very useful (and often delicious) painkillers from AARP that you can find right in your kitchen. Keep this list handy but if you are not feeling well, be sure to also see a doctor. This list is palliative and not always proven.
Red grapes are good to alleviate back pain
Ginger can be used as a painkiller
Soy is used for knee pain
Cherries are considered antioxidants and pain fighting
Turmeric can be used for alleviation of rheumatoid arthritis
Coffee seems to have pain lowering powers
Fish is good for heart health pain reduction