Why Does Tooth Pain Get Worse at Night?
1. Changes in Blood Pressure
When you lie flat, your head is level with your heart. Blood pressure in the head area rises, which increases pressure inside the inflamed tooth.
2. A Shift in Focus
During the day, work, conversation and activity mask the perception of pain. At night, in a quiet, dark environment, the brain focuses more on the pain signal.
3. Lower Cortisol
Cortisol — the body's natural anti-inflammatory hormone — drops at night. As a result, the inflammatory response and the pain both become more pronounced.
7 Possible Causes of Nighttime Pain
| Cause | Symptoms | Urgency |
|---|---|---|
| Deep decay | Throbbing with hot and cold | See a dentist soon |
| Dental abscess | Constant throbbing pain, swelling | URGENT |
| Bruxism (grinding) | Morning jaw pain, headache | Routine appointment |
| Cracked tooth | Sharp pain on chewing | Soon |
| Gum disease | Bleeding, tender gums | Routine appointment |
| Sinusitis | Pressure in the upper back teeth | ENT + dental review |
| TMJ disorder | Jaw joint pain, clicking | Routine appointment |
Bruxism (Clenching and Grinding)
One of the least noticed but most common causes of night pain. You clench your teeth during sleep without realising. This can cause:
- Pain and fatigue in the jaw muscles
- Tooth wear and sensitivity
- Headaches (particularly in the temples)
- TMJ (jaw joint) disorders
What Helps You Get Through the Night?
Things You Can Do Straight Away
- Keep your head elevated — use an extra pillow to tilt 30–45° (lowers blood pressure to the area)
- Take a painkiller — ibuprofen 400 mg (anti-inflammatory), after food
- Cold compress — 15 minutes on the outside of the cheek
- Saltwater rinse — warm water with 1 teaspoon of salt
- Clove oil — apply with a cotton bud (a natural anaesthetic)
What Not to Do
- ❌ Do not place aspirin on the tooth
- ❌ Avoid very hot or cold drinks
- ❌ Do not lie on the painful side
- ❌ Do not try to numb the pain with alcohol
When Should You See an Emergency Dentist?
- 🔴 Swelling (an abscess may be spreading)
- 🔴 Fever
- 🔴 Painkillers have no effect
- 🔴 Difficulty swallowing or breathing
- 🔴 You cannot open your mouth
These symptoms require emergency dental care.
Treatment Options
| Cause | Treatment |
|---|---|
| Decay | Filling or root canal treatment |
| Abscess | Antibiotics plus root canal treatment or apical surgery |
| Bruxism | Night guard (splint), stress management |
| Cracked tooth | Filling, crown or root canal treatment |
| Gum disease | Scaling, root surface debridement |
| TMJ disorder | Splint, physiotherapy, TMJ treatment |
Preventing Nighttime Tooth Pain
- Brush twice a day and floss
- Have a check-up every 6 months
- If you clench, wear a night guard
- Reduce caffeine and alcohol in the evening (both trigger bruxism)
Related Guides
For more on tooth pain:
- Tooth Pain: Causes and Treatment — Pillar guide
- Teeth Grinding and Bruxism — Treatment of nighttime clenching
- Impacted Wisdom Tooth Surgery — Extraction process
- Dental Abscess Treatment — Infection-related night pain
- What Is Root Canal Treatment — For advanced decay
- Fastest Tooth Pain Relief — Quick relief methods
Related Treatment Pages
This content is for informational purposes only and does not replace medical diagnosis or treatment. Please consult a specialist for decisions about your oral and dental health.
