Why does it hurt where the dentist gave me anesthesia? Explains the types of anesthesia and what to look out for!

Dental pain where anesthesia was injected oral surgery

Last updated on October 10, 2023

Anesthesia in dentistry is used for all parts of the dental process, including cavity treatment, tooth extraction, and implant treatment.

It is no exaggeration to say that dental treatment is not possible without anesthesia.

Anesthesia is used to inject a chemical solution into the gums and other parts of the body using a needle,In addition to pain during needle insertion, pain may occur even after anesthesia.

Types of anesthesia used by dentists

Dental pain where anesthesia was injected

(1) Surface anesthesia

Surface anesthesia does not use a needle, but rather a surface into which the anesthetic needle is inserted.Anesthetic in the form of an ointment to be appliedIt is.

It is often used in dentistry and is available flavored for children. Surface anesthesia is painless because it is only applied as an ointment, but if you lick the anesthetized area, you will feel a bitter taste and a slight tingling.

(2) Infiltration anesthesia

Generally speaking, anesthesia in dentistry means infiltration anesthesia.refers to. The anesthetic is placed by inserting a needle into the tissue. Xylocaine is the most commonly used anesthetic in dental infiltration anesthesia. In dentistry, 21 TP3T Xylocaine is used (11 TP3T in medicine) because it is often applied to hard tissues.

In addition, Xylocaine used in dentistry contains adrenaline as a vasoconstrictor to prolong the duration of anesthesia. Adrenaline causes the blood vessels in the surrounding anesthetized tissues to constrict,It allows anesthesia to work for a longer period of time.

(iii) Transmission anesthesia

By administering anesthesia in areas where many nerves converge or near large nerves, a small amount of anesthetic can be used to deliver anesthesia over a wide area with cooperation. In the case of dentistry, transfer anesthesia is often given at the mandibular foramen, where the large nerves are located, and if it works, anesthesia can be given cooperatively over a wide area of the mandible.It is mainly used during wisdom teeth extraction.

(4) Sedation

Anesthetics are introduced into the body through the nose or by intravenous drip, allowing the patient to relax and receive treatment.

Adapted for people who have a fear of dental care or have a chronic illness that makes it difficult for them to endure the stress of undergoing dental treatmentThis will be the case. Some large dental clinics can handle this service, but basically it is often handled at university hospitals and other large hospitals.Sedation is a method ofJust put yourself in a relaxed state.So, except for the actual dental treatmentindicates such things as location of person or thing, location of short-term action, etc.Infiltration or transfer anesthesiais required.

(5) General anesthesia

As in medical surgery, dental treatment may be performed under general anesthesia.Usually indicated for the treatment of malignant and benign tumors, jaw deformities and cysts in the field of oral surgery, among other dental diseases.but also in general dental care.Low level of cooperation with systemic diseases and dental careIt may be indicated for reasons such as As with sedation, it is indicated in larger hospitals. Infiltration anesthesia may be given as needed during general anesthesia.

When does the dentist use anesthesia?

Dental pain where anesthesia was injected

Such as tooth decay, tooth extractions, or surgical procedures required,Anesthesia is given when dental treatment is likely to cause pain. When treating small cavities, anesthesia may not be used, but for slightly larger cavities, anesthesia is used. If the cavity is more advanced and requires nerve treatment, anesthesia is of course used.

Tartar removal, a typical treatment for periodontal disease, is also rarely performed under anesthesia when removing tartar on the surface of the teeth,Anesthesia is used to remove tartar deep in the gums.Anesthesia. Anesthesia may also be used when the patient has a great fear of other dental procedures.

Precautions before anesthesia at the dentist

Dental pain where anesthesia was injected

The first thing to keep in mind before receiving anesthesia in dentistry isIt is important that you are not sick.It is. Some anesthetics used for infiltration anesthesia contain vasoconstrictors to prolong the anesthesia and to allow the anesthetic to be stored in the tissues. If a vasoconstrictor enters the body when a person is not feeling well, it may make him or her feel even worse. It is recommended that dental treatment when feeling unwell be done only as first aid, and that treatment using anesthesia be done at a later date. People with allergies should also be careful. Allergic reactions to anesthetics used in dentistry are rare, but not entirely absent. It is advisable to notify your dentist in advance if you have many allergic reactions.

What to expect after anesthesia at the dentist

The anesthetized area will remain anesthetized for several hours, depending on the amount of anesthesia administered, your physical condition that day, and other factors.Because there is no sensation where the anesthesia has taken effect,Biting cheeks, difficulty eating, andI will do so.Food should be eaten only after the anesthesia wears off.

Also, since the anesthetized area is a small wound, it should not be swollen or painful due to infection.It is important to keep it clean.

Conversely, if these things are followedYou can live your life as usual.

Why does it hurt where the dentist has given anesthesia?

Dental pain where anesthesia was injected

(1) Infected and in pain

Anesthesia in dentistry uses a very fine needle to puncture the gums and mucous membranes. Although a fine needle is used,Needle sticks can cause bacterial infections.Bacterial infections can cause pain. Most of the time without doing anything,Healing in about 1 weekI will do so.

(2) Tissue damage from anesthesia needles

Tissue damage from the anesthetic needle can also cause pain. Because gums are soft tissue, they have a self-repairing function and do not need to do anything.Healed in a few daysThere are many things to do.

(iii) Anesthetic-induced tissue necrosis

Many anesthetics used for infiltration anesthesia contain vasoconstrictors to store the anesthetic. Although vasoconstrictors are necessary for the anesthesia to work efficiently, a side effect may be necrosis of surrounding tissues due to insufficient blood flow.

Because only a small portion of the area is necrotic,Most often heals spontaneously.It is.

What if the dentist can't get rid of the pain where the anesthesia was given?

Dental pain where anesthesia was injected

If the pain in the area where anesthesia was administered does not go away,Usually heals in a few days to a weekI will do so.If the pain lasts longer than a week, you should see your dentist.It will be. If the infection persists for a long time, antibiotics are often prescribed. If tissue damage or necrosis has occurred, a laser or other means may be used to promote tissue repair or to remove the necrotic area.


Anesthesia in dental treatment is essentialIt is by no means probable that pain will occur where anesthesia has been administered.

If pain does occur, it can be caused by infection, tissue damage or necrosis, and usually heals spontaneously in a few days to a week. HoweverAlways see a dentist if pain persists.Make sure to do so.

imageWritten by dentist/issy

After graduating from the National School of Dentistry, he trained at the Tokyo Medical and Dental University Dental Hospital, and is currently working in general and orthodontic dentistry.

Member of the Japanese Society of Oral Implantology


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