What to say when you feel a pain in your body

بِسْمِ اللہِ

In the Name of Allah.

أَعُوْذُ بِاللہِ وَ قُدْرَتِہٖ مِنْ شَرِّ مَا أَجِدُ وَ اُحَاذِرُ

I seek refuge in Allah and in His Power from the evil of what I find and of what I guard against.