No. With the anaesthetics used during the treatment, canal treatment is performed without inflicting pain.

Using a hard bristled toothbrush
Teeth brushing in one-direction only and with too much pressure
Excessive consumption of acidic foods and beverages
Use of thick granulated toothpaste, cleaning pastes, and powders
Bad oral habits (such as nail biting, chewing hard objects like pins, needles, pipes, etc.)

In excessive decaying and in deep dental caries, the pulp (vascular-nervous bundle in the tooth) is involved, which is the structure responsible for the vitality of the tooth. It is infected and this infection may spread to the farthest tip of the root. If it is neglected, the inflammation may progress from the tips of the root to the adjacent tissues and may invade the jaw bone, forming cysts or tumours. This condition may require surgical intervention or extraction of the tooth. Canal treatment is performed in these conditions to save the tooth.

It is usually performed in a single session under anaesthesia. If an abscess (inflammation) is present, treatment may take a few more sessions.

Elimination of the causes of abrasion
Use of fluoride-containing mouthwashes
Application of fluoride-containing kinds of toothpaste into abraded surfaces
Drinking acidic beverages with pipets
Application of light curing composite fillings to an excessively abraded tooth with considerable tooth structure loss