Glossary · Baby
What Is Teething? Symptoms, Timeline & Relief Tips
Definition
The natural process by which an infant's primary teeth emerge through the gum line, typically beginning between 4–7 months of age and completing by approximately 3 years of age.
Teething Timeline: Which Teeth Appear When
Babies are born with all 20 primary (baby) teeth already formed beneath the gum line, waiting for the right moment to emerge. The order of eruption is relatively consistent across most children, though timing varies widely. Here is the general sequence:
| Teeth | Typical Age of Eruption |
|---|---|
| Lower central incisors (bottom front) | 6–10 months |
| Upper central incisors (top front) | 8–12 months |
| Upper lateral incisors | 9–13 months |
| Lower lateral incisors | 10–16 months |
| First molars (upper and lower) | 13–19 months |
| Canines (cuspids) | 16–22 months |
| Second molars | 25–33 months |
The second molars — the last of the 20 primary teeth — typically finish erupting by around age 3. At this point, your child has their full set of baby teeth, which will gradually be replaced by permanent teeth starting around age 6.
Real Teething Symptoms vs. Common Myths
Teething has long been blamed for a wide range of infant ailments. Research over the past two decades has helped separate what is genuinely caused by teething from what is coincidental or mythological.
Symptoms genuinely associated with teething:
- Increased drooling — often starting weeks before any tooth appears
- Gum swelling and redness at the eruption site
- Chewing and biting on toys, hands, and any available object
- Irritability and fussiness, particularly in the days surrounding the eruption
- Slightly disturbed sleep in the period just before a tooth breaks through
- Drool rash — a mild skin rash around the mouth and chin from constant moisture
Symptoms NOT caused by teething:
- Fever above 38°C (100.4°F) — multiple well-designed studies confirm teething does not cause true fever. Attribute it to a viral or bacterial illness and consult your doctor.
- Diarrhea — coincidental gastrointestinal bugs are common in this age group, but teething is not the cause.
- Runny nose or cold symptoms — these are caused by respiratory viruses, not teeth.
- Significant loss of appetite lasting more than a day or two
- Vomiting
The reason teething is so often blamed for illness is timing: the teething period coincides with a phase when maternal antibody protection wanes and infants encounter more viruses. This creates many coincidences. When in doubt, see your healthcare provider — teething alone is never a reason to delay seeking medical care for a sick baby.
Safe Ways to Relieve Teething Discomfort
The good news is that most teething discomfort is manageable with simple, safe approaches. Here are evidence-backed methods:
- Chilled teething rings: Place a silicone or rubber teething ring in the refrigerator (not the freezer — frozen rings can be too hard and damage delicate gum tissue). The cool temperature reduces gum inflammation and provides counter-pressure that reliably soothes.
- Cold washcloth: Dampen a clean washcloth, twist it, and refrigerate for 20–30 minutes. Letting your baby gnaw on the cold cloth combines counter-pressure with temperature relief.
- Gentle gum massage: Using a clean finger, apply gentle but firm pressure by rubbing back and forth on the swollen gum ridge. Many babies find this immediately calming.
- Infant pain relief medication: When other methods are not enough, age-appropriate paracetamol or ibuprofen (check dosing by weight with your pharmacist or pediatrician) can be used for genuine discomfort. Reserve for times when teething is clearly causing distress.
What to avoid: Benzocaine-containing teething gels (a risk for a rare but serious blood condition called methemoglobinemia in infants), amber teething necklaces (strangulation and choking hazard with no proven efficacy), homeopathic teething tablets (some were found to contain inconsistent levels of belladonna), and frozen hard foods (hard enough to damage gums and a choking risk).
Once teeth appear, gently wipe or brush them with an infant toothbrush and a smear of fluoride toothpaste (the size of a grain of rice). Starting dental hygiene early builds healthy habits and protects the enamel of the emerging primary teeth.
Frequently Asked Questions
When does teething start?
Most babies begin teething between 4 and 7 months of age, with the lower front teeth (central incisors) typically appearing first. However, there is considerable variation — some babies cut their first tooth as early as 3 months, while others do not see their first tooth until after their first birthday. Both extremes are normal. If your baby has no teeth by 18 months, mention it to your pediatrician or dentist.
Does teething cause fever?
This is one of the most persistent teething myths. Research consistently shows that teething does not cause true fever (a temperature of 38°C / 100.4°F or higher). Studies have found that teething may cause a very slight elevation in body temperature — a fraction of a degree — but not enough to qualify as a clinical fever. If your teething baby has a real fever, it is being caused by something else (commonly a virus) and should be evaluated by a doctor.
How can I tell if my baby is teething or getting sick?
Symptoms genuinely linked to teething include increased drooling, chewing and biting on objects, mild gum swelling and redness, slightly elevated (but not fever-level) temperature, irritability, and disrupted sleep around the time a tooth erupts. Symptoms NOT caused by teething include fever above 38°C, diarrhea, vomiting, runny nose, rash (other than a drool rash on the chin), or loss of appetite lasting more than a day or two. If your baby shows these signs alongside teething, see a healthcare provider.
How long does teething pain last?
The discomfort associated with each individual tooth typically peaks in the few days before the tooth breaks through the gum and eases considerably once the tooth has emerged. This means teething is not a continuous months-long period of pain, but rather a series of shorter (days-long) episodes spread across the two to three years during which all 20 primary teeth come in.
How can I relieve my baby's teething pain safely?
Safe, evidence-based teething relief methods include chilled (not frozen) teething rings or a clean cold washcloth to chew on — the cold soothes inflamed gums. Gently rubbing the gums with a clean finger can also provide temporary relief. For babies over 3 months, infant-appropriate paracetamol (acetaminophen) or ibuprofen (from 6 months) at the correct dose can help with more acute discomfort. Avoid teething gels containing benzocaine or lidocaine, amber teething necklaces (a strangulation and choking hazard), and frozen teething rings that are hard enough to damage gums.
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