Gail Gilman, Family Life Consultant, M.Ed., C.F.C.S. and Professor Emeritus, University of Minnesota
Some say that passing a kidney stone is like delivering a baby made of razor blades. The good news is that, although they can be excruciatingly painful, kidney stones rarely cause permanent damage, and you may be able to prevent them.
Back or side pain that will not go away is the primary symptom of a kidney stone. You may also have pinkish or foul-smelling urine, fever, or painful urination. Experts say that the incidence of kidney stones is on the rise, although no one knows why. Caucasians are more prone to kidney stones than African Americans, and men are more prone than women. Age is also a factor. The chance of getting a kidney stone rises as men enter their forties and continues to rise into their seventies. For women, the risk peaks in their fifties.
Each day, about 50 gallons of blood flows through your kidneys. The kidneys remove waste products, including various minerals and other substances, from the blood and transfer them into urine so your body can get rid of them. In people who get stones, certain minerals in the urine combine with other waste products and start to form a stone.
Kidney stones are not all the same. The most common type is made of the mineral calcium, combined with either oxalate or phosphate. Less common types of stones are made of uric acid or other chemicals, all of which are naturally found in the body. No one knows why these substances form kidney stones in some people but not in others since we all have them in our urine. Stone formation may be related to the levels of these substances in urine or to other currently unknown factors that encourage or inhibit stone formation.
Most kidney stones eventually pass out of the body during urination. But some can grow large enough to begin blocking the flow of urine. That causes intense pain and may also put you at risk for infection.
Most kidney stones that do not pass on their own are treated in an outpatient setting. The most common procedure is called lithotripsy. Greek for “stone crushing,” this technique uses shock waves to reduce kidney stones into small fragments, which then easily flow away in urine.
If you have had more than one kidney stone, you are at higher risk for forming another. But there are ways to help prevent most types of kidney stones. First, your doctor needs to know what type of stone it is. If you pass a stone, try to catch it in a strainer. A laboratory analysis can help your doctor plan a strategy to prevent more stones. Other tests, which may include urine and blood tests, can help your doctor figure out why you had a kidney stone. Your medical history, occupation and eating and drinking habits can also hold clues.
Drinking more water may help prevent kidney stones. Depending on the type of stone you are at risk for, your doctor may also advise you to avoid certain foods or drinks. For example, people prone to forming calcium oxalate stones should avoid spinach, peanuts, and chocolate. People prone to uric acid stones should cut back on meat. Doctors can also prescribe certain medications to help prevent these types of stones.
Research continues on the causes, treatments, and prevention of kidney stones. In the meantime, make sure to see a doctor if you think you have a kidney stone. While most pass out of the body on their own, some just will not go away by themselves.
Call a doctor if you have any of the following signs of a kidney stone:
- extreme pain in your back or side that will not go away
- blood in your urine (it will look pink)
- fever and chills
- vomiting
- urine that smells bad or looks cloudy
- a burning feeling when you urinate
If you would like more information on “Watch Out for Kidney Stones” feel free to contact Gail Gilman, Family Life Consultant, M.Ed., C.F.C.S. and Emeritus University of Minnesota at waldn001@umn.edu. Be sure to watch for more Family Living Focus information in next week’s paper.
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