Tooth Pain & Sensitivity – Causes, Diagnosis & Treatment in Bangalore
Tooth sensitivity and a toothache feel different, but both mean something is wrong and needs to be checked. Sensitivity is a quick, sharp “zing” to cold, heat, sweet, or air, while a toothache is more constant, may throb or radiate, and often worsens over time; painkillers alone do not address the cause, and problems usually progress if left untreated.
At Dental Solutions Clinic in Indiranagar, Bangalore, Dr. Ramya Balasubramanya (MDS Prosthodontics, BDS Gold Medallist) manages tooth‑ and nerve‑related causes, and Dr. Balasubramanya K V, MDS Periodontics, manages gum‑ and bone‑related causes. Their first priority is a clear diagnosis; pain relief is always combined with finding and treating the source of the problem, not just masking symptoms.
What Are Tooth Sensitivity and Toothache?
Tooth sensitivity occurs when exposed dentine reacts to hot or cold temperatures, touch, air, or sweet or acidic foods. According to hydrodynamic theory, those triggers move fluid through tiny dentine tubes, which then stimulate nerves near the pulp and cause brief, sharp pain, especially where enamel has worn away or gums have receded.
Toothache is usually linked to deeper problems such as an inflamed or infected pulp, a dead nerve, an abscess at the root tip, or a cracked tooth. Whether the pain is triggered or spontaneous, short or lingering, sharp or throbbing, and easy or hard to locate gives key clues to the diagnosis.
How Tooth Pain and Sensitivity Develop
- Enamel wear or gum recession exposes dentine.
- Exposed dentine has thousands of tiny fluid filled tubules leading toward the pulp.
- Heat, cold, air, or chemicals move this fluid and trigger nerves at the pulp–dentine border, causing quick, sharp sensitivity.
- As decay, cracks, or erosion go deeper, pain becomes stronger and lasts longer.
- When bacteria reach the pulp, pressure builds in the confined pulp chamber and causes throbbing, often spontaneous toothache (pulpitis).
- If untreated, the pulp dies, and infection spreads into the bone, forming an abscess around the root tip.
Common Causes of Tooth Pain & Sensitivity
- Roots are covered by a thinner, softer layer than enamel and are more prone to decay and sensitivity, especially to cold.
- Often linked to gum disease, over brushing, or age.
Enamel erosion (diet or reflux)
- Frequent intake of fizzy drinks, citrus, vinegar, or juice, or acid reflux, slowly thins enamel.
- Diet acids usually affect outer and biting surfaces; reflux acids often affect inside (palatal) surfaces of upper teeth.
- Night time grinding wears enamel and exposes dentine on many teeth at once, causing widespread sensitivity and flat, worn biting surfaces.
Cracked tooth
- Often seen in heavily filled back teeth.
- Causes sharp pain on biting that eases when pressure is released; as the crack deepens, pain can linger and later become spontaneous.
Dental decay (cavities)
- Cavities that reach the dentine cause sensitivity to cold and sweet.
- When decay reaches the pulp, pain changes to a constant, throbbing toothache (irreversible pulpitis), which many people perceive as “sudden” even though the cavity has been present for some time.
Abscess and gum disease
- Pain on biting, swelling, or a gum “pimple” can point to an abscess at the root tip or a gum infection.
- Gum disease with bone loss can cause a dull, deep ache that is hard to pinpoint.
When Is Tooth Pain an Emergency?
Book a same‑day visit at DSC if you have:
- Spontaneous, throbbing pain not eased by painkillers.
- Pain that wakes you at night.
- Swelling in the face or gum near a painful tooth.
- A tooth that is knocked out, very loose, or pushed out of position.
- Tooth pain with fever, trouble swallowing, or difficulty opening your mouth.
Dental infections can spread quickly and sometimes become serious, so rapidly worsening pain should not be ignored.
How We Diagnose Tooth Pain and Sensitivity at DSC
Bleeding gums are a symptom — not a diagnosis. Effective treatment starts with identifying the underlying cause and the stage of the disease. Our diagnostic protocol includes:
- History – We ask when the pain started, what triggers it, how it feels, how long it lasts, and where you feel it; these details often narrow the diagnosis.
- Examination – We gently tap teeth, press around the roots, check the gums, test your bite, and look for decay, cracks, wear, and recession.
- Pulp tests – Cold and electric tests show whether the nerve is healthy, inflamed, or dead, and help decide between simple treatment and root canal therapy.
- Digital X rays (RVG) – Periapical films reveal hidden decay, root tip infections, bone loss, and many fractures.
- Transillumination – A strong light shone through the tooth, which can highlight cracks not visible on X rays.
- CBCT (3D scan), if needed – Used for unclear cases, suspected vertical root fractures, or complex infections needing 3D detail.
Treatment Options for Tooth Pain and Sensitivity
Desensitisation for sensitive teeth
In-clinic desensitising treatments at DSC include professionally applied agents (such as fluoride varnish and calcium-based materials) and laser desensitisation, in which a dental laser is used to seal exposed dentine tubules and reduce nerve response.
This combination provides stronger, longer‑lasting relief than most over‑the‑counter sensitive toothpastes, and gum grafting may still be advised when gum recession is the main underlying cause.
Tooth‑coloured resin is applied over worn or exposed areas to restore a protective layer, seal dentine, and stop sensitivity; often done in a single visit.
Recommended for irreversible pulpitis or a dead, infected nerve.
Removes diseased pulp, disinfects and seals the canals, and stops pain at its source; laser-assisted RCT techniques are available at DSC for complex canals.
Crown or onlay for cracked teeth
A ceramic onlay or crown can splint a cracked tooth and spread biting forces, preventing the crack from worsening.
If the pulp is involved, root canal treatment is done first; if the crack reaches the root, extraction may be needed.
Periodontal (gum) treatment
Gum‑related pain is treated with deep cleaning, antibacterial rinses, and, when suitable, laser periodontal therapy such as LANAP or WPT, so pain eases as infection and inflammation are controlled.
Night guard for bruxism
A custom night splint reduces grinding forces, protects teeth and restorations, and often reduces sensitivity by removing constant mechanical stress.
Frequently Asked Questions
Why are my teeth sensitive to cold but not hot?
Cold sensitivity is the most common form of dentine hypersensitivity and is often seen in early or reversible pulpitis. Cold makes fluid in the dentine tubules move quickly, triggering a brief, sharp pain; if the discomfort lingers for 15–30 seconds or more after the cold is removed, it may signal a more advanced pulp problem that should be checked promptly.
My tooth hurt and then stopped hurting. Has it healed?
Not necessarily. When a badly decayed or inflamed tooth suddenly stops hurting, it can mean the nerve inside has died, not that the problem has gone. Infection can still spread from the dead pulp into the surrounding bone, so any tooth that was painful and has “gone quiet” needs urgent assessment rather than reassurance.
Can sensitivity toothpaste fix my tooth pain?
Desensitising toothpastes (with ingredients like potassium, stannous fluoride, or calcium‑based agents) can help mild, generalised sensitivity over a few weeks by partially blocking dentine tubules. They cannot fix deeper issues such as cavities, cracks, abscesses, or irreversible pulpitis, so severe that one‑tooth, spontaneous, or long‑lasting pain needs professional diagnosis, not just ongoing use of sensitive toothpaste.
My tooth hurts when I bite on it. What does that mean?
Pain on biting is often due to an abscess at the root tip, a cracked tooth that opens under pressure, or a filling/crown that is slightly too high and takes extra force. Because these problems can worsen quickly, especially if infection is involved, strong or increasing bite pain should be seen the same day.
How do I tell the difference between tooth pain and jaw pain?
Tooth pain is usually linked to a specific tooth, tends to react to hot, cold, biting, or tapping, and often shows a clear cause on examination or X‑ray. Jaw or TMJ‑related pain feels more like a diffuse ache in the jaw, temple, or ear, often worse in the morning or after heavy chewing, and is not tied to one tooth; a dentist can examine you to separate (and sometimes identify overlap between) tooth and jaw causes.