Does root canal treatment hurt?

Root canal treatment is performed under local anaesthesia and is painless. Thanks to modern endodontics under an operating microscope, you feel no pain during the procedure — only mild pressure. Slight discomfort may occur after the anaesthesia wears off, but it is easily manageable with common painkillers.

How root canal treatment works and why it doesn’t hurt

Endodontic treatment involves removing the inflamed or dead dental pulp from the root canals, thoroughly disinfecting them, and hermetically filling them. Before the procedure begins, the dentist administers local anaesthesia, which reliably numbs the entire treated tooth and the surrounding tissues. During the treatment, you feel no pain — you may only notice vibrations from the instruments or slight pressure. At our clinic, we also work under an operating microscope, which increases the precision of the procedure and minimises trauma to the surrounding tissues. A detailed description of each step can be found in our article how root canal treatment works.

How long does a tooth hurt after root canal treatment and what is normal

The question of how long a tooth hurts after root canal treatment is among the most common. In the first 1–3 days after the procedure, it is completely normal to experience mild sensitivity when biting or a dull ache in the area of the treated tooth. Studies show that approximately 40% of patients report some discomfort in the first 24 hours, but for most it subsides within a week. Only about 5% of patients experience pain after root canal treatment lasting longer than 7 days.

To relieve discomfort, we recommend:

• Over-the-counter medication — ibuprofen or paracetamol as directed on the packaging
• Avoid biting on the treated tooth — for at least 2–3 days, prefer soft foods and chew on the opposite side
• Avoid extreme temperatures — very hot or cold foods can increase sensitivity
• Maintain oral hygiene — gentle brushing helps prevent complications

If the pain does not subside after a few days, or worsens, or if swelling or throbbing pain appears, contact us. You can learn more about what is normal after the procedure and when to seek help in our article pain after root canal treatment.

Treatment under a microscope — greater precision, less pain

Modern endodontics uses an operating microscope that allows the dentist to see the root canal system at high magnification. This reduces the risk of missing small canals, minimises the removal of healthy tissue, and makes the entire procedure gentler. This directly results in less post-operative pain and a higher success rate. If you are interested in the advantages of working under a microscope, read our article about treatment under a dental microscope. A comprehensive overview of the entire field is available in our complete guide to endodontics.

What if the treatment doesn’t help — retreatment

In rare cases, a tooth may not fully heal after the first endodontic treatment, or the pain may return after several months. The cause is usually an insufficiently cleaned canal, a cracked root, or a new infection. In such a situation, retreatment (re-endodontics) is the next step — a repeat procedure in which the original canal filling is removed, new disinfection is performed, and the tooth is filled again. More about this procedure and how it works can be found in our article retreatment — how it works.

When to consider retreatment

• Pain or sensitivity persisting months after the initial treatment
• X-ray findings showing persistent or new inflammation at the root
• Gum swelling around a previously treated tooth

If you are wondering when endodontic treatment is necessary or have questions about the cost — endodontic treatment at our clinic starts from €230, retreatment from €340 — the current overview can be found on our pricing page. If you are experiencing tooth pain, do not hesitate to book an appointment — the sooner the tooth is treated, the higher the chance of saving it.