Tooth pain can appear suddenly or gradually, and many people ignore early symptoms until the discomfort becomes unbearable. But certain signs clearly indicate that the nerve inside your tooth is infected — and this is when a root canal becomes necessary.
If you live in South Kolkata, especially near Baghajatin, Santoshpur or Jadavpur, this guide will help you identify the early warning signs and understand when to seek professional treatment.

A root canal is a treatment used to remove infection from the inside of a tooth. When the pulp (nerve) becomes infected due to deep decay or injury, the tooth becomes painful and sensitive. The treatment cleans the infection and saves the natural tooth.
Modern root canals are safe, quick and comfortable.
Pain that stays for hours or returns frequently is a major warning sign. This type of pain often worsens at night or while chewing.
Ignoring this can cause the infection to worsen.
It’s normal to feel momentary sensitivity, but if the sensation stays for more than 10–30 seconds, it often means the nerve is damaged.
This symptom is one of the strongest indicators of a root canal requirement.

Gum swelling or redness near one specific tooth usually indicates infection.
This means the infection is spreading to the surrounding tissues.
A tooth turning darker than the rest is a sign of nerve death. It could appear brown, grey or black.
Discoloration is often ignored by patients, but it is a major internal warning sign.
If you experience a sharp pain when applying pressure, this may mean the infection has reached the root or bone.
A dentist should check this symptom immediately.
An infected tooth may feel like it is sitting higher than the rest due to swelling inside the bone.
This is often seen in moderate to severe infections.
A gum boil or pus-filled bump is a clear sign of an abscess — a serious dental infection.
Delaying this can cause swelling and fever.

No. Modern root canal treatment is painless because of advanced anesthesia and rotary systems.
Most patients say it’s as comfortable as a normal filling.
Avoiding treatment can lead to severe complications.
Early treatment saves the tooth and reduces discomfort.
City Smiles offers advanced endodontic care with the latest technology.
We treat patients from Baghajatin, Santoshpur, Jadavpur and nearby areas with care and precision.
We are conveniently located for patients from:
Tooth infection symptoms should never be ignored. Persistent pain, sensitivity, swelling or discoloration are key indicators that you may need a root canal. Early treatment is the safest and most comfortable approach.
If you’re experiencing these symptoms, visit us for a quick evaluation.
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Dr. Sagnik is known for his gentle approach, precision-based dentistry, and modern treatment techniques. Specializing in endodontics (root canal treatment), pediatric dentistry, and pain-free restorative care, he has helped thousands of patients regain their smiles with confidence.
At City Smile Dental Care, the focus is simple:
Advanced dentistry. Zero fear. Total comfort.
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