3. Sensitivity caused by tooth-whitening toothpaste
Try a regular type of toothpaste. Some brands add whitening agents that are too aggressive. They whiten your enamel, but, at the same time, they make your teeth much more sensitive. You need a milder version of your favorite toothpaste.
4. Sensitivity caused by gum disease
Pay attention to your gums. If they are healthy, then your teeth will also be quite healthy and strong. Resolve the underlying problems first. See your dentist to find out if you have any gum disease like gingivitis. Maintain your dental health and thoroughly brush your teeth with a soft brush. Do not damage your gums. Opt for healthy foods too.