You probably think everyone gets wisdom teeth. That is not true.
Some people have all four. Some have one or two. Some have zero.
So does everyone have wisdom teeth? The short answer is no. About 35 percent of people are born without at least one wisdom tooth. A lucky 20 percent have none at all.
Let me explain why. Plus when they show up, how to spot infection, and what you can do at home before seeing a dentist.
Does Everyone Have Wisdom Teeth? The Genetic Truth
No. Not everyone has wisdom teeth.
These are your third molars. They sit in the very back of your mouth. Some people never develop them at all.
Scientists found a genetic mutation thousands of years ago. Our jaws got smaller as we cooked softer food. There was no space for extra teeth. So the body stopped making them in some people.
Today, missing wisdom teeth runs in families. If your parents have none, you probably will not either.
What Age Do Wisdom Teeth Come In
This is when most people notice them.
What age do wisdom teeth come? Usually between 17 and 25. That is why they are called “wisdom teeth.” You are older and supposedly wiser.
Some people get them at 30. Rare but possible. Others never get them at all.
Early Signs They Are Coming
Pain in the back of your jaw. Swollen gums behind your molars. A small white bump poking through.
These signs show up around age 18 for most people. Not everyone feels pain. Some wisdom teeth come in completely straight with no issues.
Why No Wisdom Teeth Happens
Evolution is the simple answer.
Why no wisdom teeth is purely genetic. A mutation in the PAX9 and MSX1 genes tells your body not to form those tooth buds. No tooth buds means no teeth.
This is becoming more common. About 20 to 25 percent of people today are born with at least one missing wisdom tooth. In some populations, like Inuit communities, nearly 45 percent have no wisdom teeth.
You are not broken. You are not abnormal. You are just evolved.
Signs of Wisdom Teeth Infection You Cannot Ignore
Impacted wisdom teeth trap food and bacteria. Then infection starts.
Signs of wisdom teeth infection include:
- Throbbing pain at the back of your jaw
- Red, swollen gums that bleed when you brush
- Bad taste in your mouth that will not go away
- Swollen lymph nodes under your chin
- Fever and feeling generally unwell
Do not ignore these. The infection can spread to your throat or jawbone. That lands you in the hospital.
What Is Pericoronitis
This is a specific infection. It happens when a wisdom tooth is partially covered by a flap of gum tissue. Food gets trapped under that flap. Bacteria grow.
Pain gets worse when you bite down. You might see pus near the tooth. The infection comes and goes. But it always returns until the tooth or gum flap is treated.
Pericoronitis Treatment at Home (Temporary Only)
You need a dentist. But these steps help until your appointment.
Pericoronitis treatment at home that actually works:
- Rinse with warm salt water (one teaspoon salt in one cup water) four times daily
- Use an antiseptic mouthwash with chlorhexidine if you have it
- Gently flush the area with a curved syringe — ask your dentist for one
- Take ibuprofen for pain and swelling
- Avoid crunchy or sticky foods on that side
What Never Works
Do not poke the area with a toothpick. Do not use hydrogen peroxide full strength. Do not put aspirin directly on the gum. That burns the tissue.
These home treatments buy you 2 to 3 days max. Then see a dentist. Untreated pericoronitis turns into a serious jaw infection.
Do You Need Wisdom Teeth Removed
Not always. Some people keep their wisdom teeth for life.
You probably need removal if:
- The tooth is impacted — stuck sideways under the gum
- You have repeated infections
- The tooth is damaging the molar next to it
- You cannot keep it clean because of the gum flap
You can keep them if:
- They came in straight
- You can brush and floss them normally
- You have no pain or infection
Get an X-ray. Only a dentist can tell you for sure.
Frequently Asked Questions
Does everyone have wisdom teeth or is it genetic?
It is genetic. About 20 to 35 percent of people are missing at least one wisdom tooth. Some ethnic groups have even higher rates. Ask your parents about their wisdom teeth. That is your best predictor.
What age do wisdom teeth cause the most problems?
Between ages 18 and 25. This is when they erupt or become impacted. People over 30 rarely develop new problems from wisdom teeth unless the tooth is already damaged or infected.
Why no wisdom teeth is becoming more common?
Evolution. Human jaws have gotten smaller over thousands of years. There is simply less space for third molars. The genetic mutation for missing wisdom teeth is being passed down more frequently. Some scientists believe most humans will have no wisdom teeth in the distant future.
Signs of wisdom teeth infection or just normal pain?
Normal pain is dull and goes away in a few days. Infection pain is sharp, constant, and gets worse. You will also have swelling, bad taste, and possibly fever. If you have fever, see a dentist immediately.
Pericoronitis treatment at home before seeing a dentist?
Warm salt water rinses four times daily. Ibuprofen for swelling. Soft foods only. No poking. No peroxide. These steps manage symptoms for 2 to 3 days. Then get to a dentist. Pericoronitis does not go away permanently without treatment.
Know Your Mouth, Know Your Teeth
Does everyone have wisdom teeth? No. And that is completely normal. Some people have four. Some have none. Some deal with infections. Some go their whole life without a single issue. Every mouth is different, and yours is no exception.
The most important thing you can do right now is get informed. Schedule a dental X-ray if you have not had one recently. Find out whether your wisdom teeth are present, impacted, or already gone. Do not guess. Do not wait until the pain forces your hand.
If you are experiencing symptoms — jaw pain, swollen gums, bad taste, fever — do not try to ride it out on your own. Home remedies are a bridge, not a solution. Salt water rinses and ibuprofen buy you time. A dentist fixes the problem.
Your mouth affects everything. Your sleep, your eating, your confidence, your overall health. Take it seriously. Book that appointment. The ten minutes it takes to call a dentist is always worth it.