They are a very common problem that occurs in 1 of every 7 people.
Tooth sensitivity is caused by the gradual exposure of the softest part of the tooth under the enamel, called "dentin".
Dentin is close to the nerve endings of the tooth and to take food and drinks hot, cold or sweet can cause this transient pain.
The most frequent causes of dentin is exposed are brushing too hard, bruxism and gum disease.
There are clinical and home treatments that reduce or completely eliminate this condition.