Why would tooth ache

Why would tooth ache

Question:

Gender: female
Age: 24
When eating, especially cold or hot, tooth ache, I always have some cavities, not very serious, which saw teeth white face, do not know whether this tooth decay, very depressed, I prefer to eat ice cream, but now is a little bit afraid of the time, eat teeth ache

Treatment:

After the surface damage, if the teeth in oral liquid concentration changes, or temperature drop, which will result in a tooth tube called impure liquid appears instantly small, oppressive nerve and let you feel terrible pain. As periodontitis, tooth decay, active therapy.