Tooth sensitivity is a common problem for most people. Our teeth can be greatly affected by hot, cold, sweet, and sour food or drink. Over-enthusiastic brushing, recession of gums, gum disease (periodontitis) all can expose the soft, porous structure of the tooth (dentin), making it susceptible to external stimuli.
Pain can be mild and tingly or sharp and intense. This symptom sometimes is a sign for more serious diseases. Whenever you are suffering from pain of sensitivity, you should go see your dentist before it persists or worsens.
Pain signal enters tubule through exposed dentin and excites the nerve.
A review of brushing techniques and diet can help reveal causes of sensitivity. Avoid over-brushing because it can cause damage to your teeth and/or gums. Sensitivity protection toothpaste works by blocking the opening of the exposed dentin or by preventing the transfer of the pain signal from the nerve to the brain.
You should feel relief by using sensitivity protection toothpaste for two weeks. If you stop brushing with this kind of toothpaste, the sensitivity pain may return.
Also, some prescribed desensitizing agents may help you. Consult your dentist about it.