Check out the below link for an oldie but a goodie, mostly to show Greg E's ibuprofen carpet bomb method without having to cut and paste it. I know you said you are on the road but ibuprofen should be easily gotten.
There are some good suggestions but not as conducive to traveling. Personally when I feel things flare up I usually double or triple my fish oil dose along with the ibuprofen. Personally depending on myself on what I think it is I go with either ice or heat. That is just through the years of knowing myself and what I think I may have done.