Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
As per your complain and presentation of symptoms sensitivity of teeth can occur due to either dentinal
hypersensitivity that is due to attrition of the top layer of teeth known as enamel leading to exposure of dentin that is inner layer and as the nerves are in close proximity there is sensitivity to hot and cold..
Application of desensitizing paste over the teeth twice a day can help.
Avoid extremes of hot and cold foods and fluids..
But in case if you have a large number of teeth that are
root canal treatment and if there is sensitivity even in those areas then the most common cause of sensitivity is
gum infection known as
Gingivitis and in case if the infection is deep and involves underlying alveolar bone then it is called
Periodontitis.
In this case Deep scaling and curettage will help followed by antibiotics and painkillers.
You should consult an Oral Physician and get evaluated and treatment can be planned according to the cause..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora.