What is the ruling on wearing silver for healing, and is it true that jinn flee from whoever wears it?

We have no knowledge regarding what you asked about. The most we found is Ibn Al-Qayyim's statement in "Zad Al-Ma'ad" that silver is a beneficial remedy for worry, sadness, heart weakness, and palpitations. It is used in pastes and extracts corrupt humors from the heart, especially when combined with honey and saffron. He also mentioned an authentic Hadith from the Prophet, peace be upon him: "But you must use silver, so play with it playfully." As for jinn fleeing from someone wearing silver, we have not found any report or trace of that.