بِسْمِ اللَّهِ، أَعُوذُ بِعِزَّةِ اللَّهِ وَقُدْرَتِهِ مِنْ شَرِّ مَا أَجِدُ وَأُحَاذِرُ
Bismillah, a'udhu bi-izzatillahi wa qudratihi min sharri ma ajidu wa uhadhir
In the name of Allah, I seek refuge in Allah's might and power from the evil of what I feel and fear.
Place your hand on the area of pain and recite 7 times
The Prophet (PBUH) taught Uthman ibn Abi al-As this dua when he complained of pain in his body.