Yes. In most cases, cavities in baby teeth should be treated. Baby teeth help children chew, speak and smile, and they hold space for the adult teeth, with some staying until around age 10 to 12. An untreated cavity can grow, cause pain and lead to infection that may affect the adult tooth developing underneath.
Why baby teeth matter, even though they fall out
Baby teeth, also called milk or primary teeth, are not only temporary placeholders. The front teeth usually fall out around age 6 to 8, but the back molars often stay in the mouth until 10 to 12 years old. That is many years of chewing, speaking and growing.
- They let children chew a varied, healthy diet.
- They help with clear speech while language is developing.
- They keep the right amount of space for the adult teeth. If a baby molar is lost too early, neighbouring teeth can drift and the adult tooth may come in crooked or get blocked.
- They support a child’s confidence when smiling and talking with friends.
What happens if a cavity is left untreated
A cavity is a hole caused by tooth decay: bacteria in plaque turn sugars into acids that slowly dissolve the tooth. The enamel (the hard outer layer) of baby teeth is thinner than that of adult teeth, so decay can reach the nerve more quickly.
When decay reaches the pulp, the soft inner part of the tooth with nerves and blood vessels, a child may have toothache, trouble sleeping or refuse to eat on one side. Infection can then spread to the gum and form an abscess, a painful pocket of pus. Repeated infection around a baby tooth can sometimes affect the adult tooth forming beneath it, and in rare cases facial swelling needs urgent care.
Signs of a cavity in your child’s teeth
Early decay often causes no pain at all, which is why regular check-ups matter. Look out for:
- white chalky spots near the gum line, an early sign that enamel is losing minerals;
- brown or black spots or visible holes;
- food getting stuck between the back teeth;
- sensitivity to cold, sweet or hot foods;
- toothache, swelling of the gum, a small “pimple” on the gum or bad breath.
Our article on your child’s first dental visit and what happens there explains when check-ups should start.
Treatment options, from simple to more involved
The right treatment depends on how deep the decay is, the child’s age, how long the tooth still needs to stay and how cooperative the child can be. The dentist explains the options to parents before starting.
Early decay: stopping it before it becomes a hole
White spots and very small lesions can often be stopped or even reversed with better brushing, less sugar and professional fluoride varnish. The dentist will then monitor the tooth at each visit. Read more about fluoride varnish and fissure sealants for children.
Fillings
When there is a real hole, the decayed part is removed and the tooth is filled, usually with a tooth-coloured material. A simple filling often takes 20 to 30 minutes.
Nerve treatment and crowns for baby teeth
If decay has reached the nerve but the tooth can be saved, the dentist may carry out a pulpotomy, a small nerve treatment that removes the inflamed part of the pulp. Large cavities in baby molars are often covered with a preformed crown, a ready-made cap that protects the tooth until it falls out naturally.
Extraction and space maintainers
When a tooth is too damaged or infected to save, it is removed. If a back tooth is lost early, the dentist may suggest a space maintainer, a small appliance that keeps the gap open for the adult tooth.
What affects the cost
The cost depends on the number of teeth involved, the type of treatment (filling, nerve treatment, crown or extraction), whether X-rays are needed and how many visits are required. A consultation gives you a clear plan for your child.
Will it hurt? Anaesthesia and keeping children calm
Most treatments are done with local anaesthesia, which numbs only the area around the tooth. A numbing gel is usually applied first so the injection is barely felt. Children often feel pressure or vibration, but not pain.
Paediatric dentists use simple, friendly words, show instruments before using them and keep sessions short. For very young or very anxious children, treatment may be spread over several short visits. Prepare your child with calm, positive words and avoid phrases like “it won’t hurt”, which can create worry.
After treatment and preventing new cavities
After local anaesthesia, the lip and cheek stay numb for a few hours. Watch your child so they do not bite or chew the numb area, and offer soft food once the numbness wears off. Mild sensitivity for a day or two is normal.
- Brush twice a day with fluoride toothpaste, with an adult helping or checking until the child brushes well alone. The NHS guidance on children’s teeth explains the right toothpaste amount for each age.
- Keep sweet foods and drinks to mealtimes, and avoid sweet drinks or milk in a bottle at night.
- Book regular check-ups as advised by the dentist.
Our practical guide to preventing tooth decay in children gives more everyday tips.
Children’s dentistry at Ajam Dental Clinic in Tripoli
At Ajam Dental Clinic, all dental care for children, from babies to teenagers, is handled by Dr. Soumaya Ajam, who holds a University Diploma in Paediatric Dentistry from Université Saint-Joseph de Beyrouth. She examines your child’s teeth, explains the findings to you and proposes a treatment plan suited to your child’s age. You can learn more about our children’s dental treatments.
Families come to our clinic on Fouad Chehab Boulevard from across Tripoli, including El Mina, Abu Samra, Al-Tall, Zahriyeh and Bahsas, as well as from Qalamoun and the rest of North Lebanon. If you have noticed a spot, a hole or toothache, contact us by WhatsApp or phone to book a consultation.
Frequently asked questions
Can a cavity in a baby tooth heal on its own?
A real hole in a tooth cannot grow back, because enamel does not regenerate. However, very early decay, which looks like a chalky white spot, can sometimes be stopped and even partly repaired. Fluoride from toothpaste and professional varnish helps the enamel take back minerals, especially when sugary snacks and drinks are reduced. This is why it is worth seeing the dentist when you first notice a change in colour. Once the surface has broken down into a cavity, it needs treatment or careful monitoring decided by the dentist, rather than waiting for it to disappear.
At what age can a child have a filling?
There is no fixed minimum age. Even toddlers can need treatment if decay is present, although the approach is adapted to the child. For very young children, the dentist may first try to slow the decay with fluoride and better home care, and choose simple, quick treatments when possible. As children grow and become more cooperative, standard fillings under local anaesthesia become easier. What matters most is the size of the cavity, the symptoms and how the child copes, so the dentist will discuss the most suitable timing and method with you.
What if my child refuses to open their mouth at the dentist?
This is common and nothing to be embarrassed about. Many young children are shy or scared on their first visits. Paediatric dentists usually start with a gentle, short visit to build trust, letting the child sit in the chair, see the mirror and count their teeth. Treatment can be spread over several short appointments. At home, talk about the visit in a calm, positive way, read a story about the dentist and avoid using the dentist as a threat. If a child cannot cooperate and treatment is urgent, the dentist will explain other options with you.
Is local anaesthesia safe for young children?
Local anaesthesia is widely used in children's dentistry and is considered safe when the dose is adjusted to the child's weight, which the dentist calculates. Side effects are usually minor, such as temporary numbness. The most common problem is that children bite or chew their numb lip or cheek afterwards, which can cause a sore spot, so keep an eye on them for a few hours. Always tell the dentist about your child's medical history, medicines and any allergies before treatment, so the anaesthesia can be chosen safely.
My child has a swollen gum and a fever. What should I do?
A swollen gum next to a decayed tooth, sometimes with a small pimple that releases pus, usually means an abscess, which is an infection. Contact a dentist as soon as possible so the tooth can be examined. If your child has a fever, swelling of the face that is spreading, swelling near the eye, difficulty swallowing or breathing, or seems very unwell, seek urgent medical care immediately. For pain, ask a pharmacist or doctor about a children's painkiller at the right dose for your child's age and weight, and never put aspirin on the gum.
Does my child need dental X-rays to find cavities?
Not always, but sometimes they are very useful. Cavities often start between the back teeth, where they cannot be seen with the eye alone. A small X-ray helps the dentist see how deep the decay is and whether the nerve or the bone around the root is affected, which changes the treatment choice. Dentists take X-rays only when they are needed, and dental X-rays for children use a very low dose of radiation. The dentist will explain why an X-ray is suggested before taking one.
Have a question about your teeth?
Send a WhatsApp message to Dr. Abdel Rahman Ajam or Dr. Soumaya Ajam, or call the clinic to book a consultation.
This article provides general information for patients. It does not replace an examination by a dentist, who can advise you on your own situation.