How long does it take for the numbing effect to wear off after getting a dental filling with anesthesia?

Oct 16, 2025 Source: Cainiu Health

Dr. Liu Chao

Introduction

If the tooth decay is deep, a nerve block anesthetic will be required. This type of anesthetic has a broader and deeper effect, and its duration may last 2 to 3 hours. For individuals with slower metabolism, the numbness may persist for more than 3 hours. Mild swelling during this period is normal and not a cause for concern. Avoid aggressive brushing within 24 hours and refrain from touching the restored area.

Dental anesthesia typically wears off within 1 to 3 hours. Local infiltration anesthesia tends to wear off more quickly, while nerve block anesthesia lasts slightly longer, with duration depending on individual metabolic rates. If numbness persists for an unusually long time, contact your dentist promptly for advice.

When local infiltration anesthesia is used for dental fillings, it affects only a small area around the gums and tooth. Due to the smaller dosage and faster metabolism, most people experience gradual dissipation of numbness within 1–2 hours, with reduced numbness in the lips and tongue and restored normal sensation.

If the tooth decay is deep, nerve block anesthesia may be required. This type of anesthesia has a broader and deeper effect, and its numbing effect may last 2–3 hours. Individuals with slower metabolism might require over 3 hours for full recovery. A mild sensation of swelling during this period is normal and not a cause for concern.

For daily care, avoid chewing on the affected side before the anesthesia wears off to prevent biting your lips or tongue. Avoid consuming very hot foods to reduce irritation to the newly filled tooth. If mild soreness occurs after the anesthesia wears off, cold compresses can help relieve discomfort. Brush gently and avoid applying excessive pressure on the filled area.

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