Is it permissible for a diabetic patient suffering from dry mouth and bad breath to chew gum to moisten their mouth and prevent the odor, especially during prayer?

It is disliked for a worshipper to place something in their mouth, as it contradicts khushu' (devotional humility) and may lead to not pronouncing the letters correctly. Chewing invalidates the prayer if it is excessive; some jurists have estimated this to be three continuous movements. If placing chewing gum in the mouth is necessary for recitation or to avoid bad odors, without invalidating chewing or swallowing, then there is no harm in it.