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Dr. Gellner: One of the most common reasons a parent brings their children to the pediatrician is because they're concerned their child has an ear infection. I'll talk about the symptoms to watch for and what to do if your child does have one on today's Scope. I'm Doctor Cindy Gellner.

Announcer: Health tips, medical views, research and more for a happier, healthier life. From University of Utah Health Sciences, this is The Scope.

Dr. Gellner: Parents come in all the time saying their child has been pulling on their ear and they know this means they have an ear infection. Well, not so fast. Kids pull on their ears for a lot of reasons, ear infections only being one of them. Other causes are teething, ear pressure from nose congestion or allergies, and because it just plain feels good, especially when kids are tired.

There are a lot of nerve endings in the ear and that's why it's such a popular place for massage therapists and acupuncturists to work on. So other than pulling, your child has no other symptoms. Ear infection? Maybe not. But say your child also has a fever, has had a cold for a while, isn't sleeping like they normally do and are just plain cranky, then it's time to get those ears checked out.

Despite what a lot of people think, going outside in the wind or cold without a hat on won't cause an ear infection. Ear infections happen behind the eardrum, not in front of it where the cold and the wind would hit. An ear infection is caused by bacteria and it's a common complication of a viral cold. Nasal congestion and mucus block off the tube that connects to the middle ear to the back of the throat. That's the Eustachian tube. And then the ears can't drain properly if that's blocked. This makes a pool of fluid, which is a great breeding ground for bacteria and, hence, an infection is born.

Sometimes, kids have what are called serous ear infections. That means there's fluid behind but it's not all gross, and this fluid usually goes away in a few months. This type of infection does not need antibiotics.

Kids between six months and two years are most likely to get ear infections, but they're actually pretty common until age eight when the internal anatomy of the ear starts to change and they aren't as prone to infections. Most kids will have at least one ear infection and over 25% of these children will have repeated ear infections. In a small percentage of children, the pressure in the middle ear fills with puss and that causes the eardrum to rupture and drain. It's usually just a small hole, which heals over the next three months.

Now, you find out your child does indeed have an infection, you need to be sure your child takes the antibiotics prescribed by the pediatrician and finish the entire course to make sure all the bacteria is treated. Tylenol and Motrin can also help with pain.

Some people talk about putting warm oil into the ear, but that's not a good idea. If the eardrum bursts, follow up in three weeks to make sure the infection is gone and the eardrum is healing. Ear infections seem like a rite of passage for some kids. I've had parents try looking in their child's ears with a flashlight to see if they have infections. Trust your child's ear exams to the experts. As pediatricians, we get really good at looking in ears and seeing if there truly is an infection or not.

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Swimmers get water in their ears a lot. But when fluid starts coming out of the ears, it's time to see the doctor.

If your child has swimmer's ear, you'll probably know it pretty quickly. He or she may have painful ear canals, their ear will hurt if it's moved up and down or if the tab on the outer ear that covers the ear canal is pushed in. If the child's ear feels really plugged up or you see discharge coming out of the ear. Now the discharge will be clear at first. But if it's not treated within 24 hours, it usually becomes yellow, and more like puss coming out of the ears. Clear drainage without ear pain is most likely water. That's not concerning for an infection.

Swimmer's ear occurs when your child's ears have been in the water for long periods of time and the water gets trapped in the ear canal. And the lining becomes damp, swollen, and prone to infection. Children are more likely to get swimmer's ear from swimming in a lake or a river compared to swimming in swimming pools or the sea. During the hottest weeks of summer, some lakes have really high levels of bacteria and narrow ear canals of children increase the risk of swimmer's ear.

Cotton swabs also contribute to the problem by causing wax build up. When you go to clean your clean your ears with a Q-tip, you're actually pushing the wax in further, and then you can get water trapped behind it. Swimmer's ear is easy to treat and the symptoms should be better within three days of starting treatment and cleared up within seven days.

Your child will need eardrops prescribed by your pediatrician that have both an antibiotic and a steroid in them. Be sure to run the eardrops into the ear canal with your child lying on his side so that air isn't trapped under the drops. Move the earlobe back and forth to help the eardrops pass down deep into the canal. And be sure to finish the eardrops as prescribed to make sure the infection is completely treated.

Generally, your child should not swim until the symptoms are gone. Continued swimming may cause a slower recovery, but it won't cause any serious problems. For mild swimmer's ear without puss coming out of the ear or serious ear pain, you can treat it at home. Use a mixture of one part water and one part white vinegar, and put 3 drops in the affected ear. After five minutes, remove the drops by turning the head to the side and rubbing the ear. Do this twice a day until the ear canal feels normal again.

So often parents ask, "How can I prevent swimmer's ear in my child?" First, limit how many hours a day your child spends in the water. The key to prevention is keeping the ear canals dry when your child is not swimming. After swimming, get all of the water out of the ear canals by turning the head to the side and pulling out the earlobe in different directions to help water run out. You can also put a towel into the ear and help soak up the water. Dry the opening to the ear canal very carefully so you don't injure the ear canal by going too far in.

If recurrent ear infections are a big problem, rinse your child's ear canals with three drops of rubbing alcohol each time he or she finishes swimming to help dry the ear canal and kill germs.

Another helpful home remedy is to use the solution of half water and half vinegar. The vinegar will restore the normal acid balance to the ear canal. Your child may also benefit from using earplugs or a swimming cap to keep the water out of the ear canal in the first place. Remember, rubbing alcohol is helpful for preventing swimmer's ear, but not for treating it because it stings the ear too much.