For lower jaw tooth sensitivity, using a desensitizing toothpaste containing potassium nitrate or arginine is highly effective. These active ingredients work by blocking the tiny pathways to the nerves in your teeth. Additionally, using a fluoride mouthwash and a soft-bristled toothbrush will help protect your enamel. Avoid highly acidic or extremely hot and cold foods for a few days. Since jaw sensitivity can sometimes be linked to gum recession, teeth grinding, or a cavity, I recommend visiting a dentist for a routine checkup to find the exact cause. Rest assured, this is a very common and highly treatable condition.

Since your dental scaling didn't resolve this, your bad breath is likely directly linked to dry mouth, as saliva naturally clears odor-causing bacteria. I recommend: 1. Alcohol-free mouthwash: Use formulations containing xylitol or zinc, which neutralize odor without drying your mouth further. 2. Saliva substitutes: Over-the-counter oral sprays or lubricating gels containing carboxymethylcellulose help maintain moisture. 3. Saliva stimulants: Chew sugar-free gum with xylitol. For severe cases, a doctor may prescribe stimulants like pilocarpine. Ensure you stay well-hydrated. I highly recommend consulting your doctor or dentist to review if any of your current medications or medical conditions are contributing to this.