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feeling fine

BEHIND THEBELLYACHE

A 9-year-old girl arrived at my pediatric practice recently complaining of a stomachache. Over the past 12 months, she had come in numerous times with abdominal distress. Sometimes the pain was associated with a sore throat — in which case I had to make sure it was not caused by a strep throat — at other times with diarrhea due to a viral infection. But this time, as was often the case, there was nothing in the medical history or even medical tests that suggested why her stomach hurt. Everything was normal.

Then we looked at a diary her mother had been keeping at my request to track her daughter's eating and bathroom habits, and to see if there was any psychological link to the pain. It quickly became clear that the girl's recurrent stomachaches were related to stress from school. Once the girl understood the connection and was able to talk about the stress, her pain subsided considerably, and I have seen her less often.

The problem

Stomachaches account for numerous visits to pediatricians' offices. Parents often worry that a kidney infection or appendicitis is responsible for the pain. Although serious disorders can cause abdominal pain, stomachaches in kids are usually due to something less worrisome, such as food issues, constipation or stress, especially at the start of the school year.

Abdominal pain can be broadly divided into two types. Acute pain has been present for less than a week. It can come on suddenly or can build slowly over the course of a day. Pediatricians see children with this type of pain every day. The problem is often caused by a simple viral infection, the "stomach flu" or even strep throat. Recurrent pain, on the other hand, has been present off and on for weeks, months or years. Ten to 15 percent of school-aged children will seek medical care for recurrent abdominal pain.

Most cases of recurrent abdominal pain are caused by stress, constipation or lactose intolerance, in which a person's digestive system cannot process a sugar found in dairy products. Diets that include lots of foods with high-fructose corn syrup bother some. Some drugs, such as the anti-inflammatory medication ibuprofen, can cause abdominal pain, though it occurs less often in children than adults. More serious causes of recurrent abdominal pain, such as celiac disease, ulcerative colitis and Crohn's disease, are less common in a general pediatric setting.

Making a diagnosis

When doctors see children with recurrent pain, they start with a detailed medical history because that often suggests a diagnosis.

Pain that occurs more often during the week than on weekends or holidays is likely to have a stress component. However, weekends are not necessarily stress-free. Children may still have to deal with sports, religious school or family issues such as parental separation or divorce.

Symptoms that increase the chances that a serious problem could be causing the pain include recurrent vomiting, diarrhea or weight loss; pain that wakes a child up from sleep; and pain that is not located in the middle of the abdomen — around the belly button. In these cases, a doctor will often order blood, urine and stool tests as well as an abdominal X-ray and sonogram.

But most of the time, stomachaches can be handled with a few changes to diet or routine.

Lactose Intolerance

Symptoms of lactose intolerance include nausea, stomachache, belching, loose bowel movements and excessive gas.

Some people can handle small amounts of lactose. With other people, any amount of lactose will make them sick.

The best way to treat lactose intolerance is to avoid milk sugar. Most people do this by drinking lactose-free milk. Lactase supplements can also be taken. Another option is to replace dairy products with substitutes made only from nonmilk sources such as soy, rice or almonds.

Constipation

I have been a pediatrician for more than 25 years, and three things continue to surprise me. First, large numbers of people suffer from constipation. According to Benny Kerzner, emeritus chief of pediatric gastroenterology at Children's National Medical Center, 25 percent of referrals to specialists like him are for constipation. Second, most people do not realize that constipation is a common cause of abdominal pain. Third, constipation manifests itself in unsuspected ways.

People with constipation may pass large, hard bowel movements once or twice a week or lots of small "rabbit pellets" every day. Some people experience constipation regularly while others have it once in a while. Some people with constipation have no symptoms other than having to work hard when they go to the bathroom. Others may feel bloated or have a stomachache for days before they go. Constipation can come on gradually or so suddenly a person may double over in pain. It is not uncommon for parents to rush their child to an emergency room because they thought the abdominal pain was due to appendicitis.

Very few medical conditions cause constipation in children. Most of the time, it occurs because of diet or insufficient water intake, or because the problem runs in the family.

Foods that cause constipation include milk products and processed grains (white bread, pasta, rice).

For stomachaches caused by constipation, opt for foods that are high in fiber, drink plenty of liquids, get lots of exercise (which gets things moving through the large intestine) and don't delay going to the bathroom when the need strikes.

Talk to your doctor before using any medication.

Stress

The day-to-day stress that people deal with — worrying about bills, worrying about interacting with peers in school — is less intense than the classic "fight or flight'' response to danger, but it lasts longer. And the same biological reactions can occur: rapid heart rate; feeling tense, nervous or queasy; getting a stomachache; and having sweaty palms.

A good way to explain this phenomenon to children is to ask them if they have ever gotten butterflies in their stomach before a soccer game or when they had to speak in front of their classmates.

Stress causes abdominal pain when the nerves in a person's intestinal tract overreact to the normal process of digesting food and pushing waste out of the body. But the stressful situation does not always occur when the person is having pain. Second, the pain is very real.

Dealing with stress-induced abdominal pain can be tricky. In general, a healthful diet is important, and in some people, taking probiotics can help reduce pain. These other steps can help:

• Learn some deep breathing techniques. There are CDs specifically for children, and yoga classes also provide breathing training for older children.

• Try to figure out where the stress is coming from by talking to your child about school, friends, home, etc. Talk to your pediatrician to get guidance on how to address the problem.

• Consult mental health professionals if stress-induced stomachaches do not respond to suggestions from your pediatrician.

Howard Bennett is a pediatrician in Washington and author of "Max Archer, Kid Detective: The Case of the Recurring Stomachaches" and has a blog on pediatric problems at howardjbennett.com.

BEHIND THEBELLYACHE 11/30/12 [Last modified: Friday, November 30, 2012 6:41pm]
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