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Are Warts a Sign of Ill Health?

Pediatrics Expert Advice from Shari Nethersole, M.D.

Q: My 10-year-old son was diagnosed with a plantar wart on his foot over a month ago. He has been for weekly treatments at the foot doctor, who finally suggested that it should be removed. We recently discovered what appears to be another wart on his baby toe. The first wart is under his big toe on the same foot. Why does my son get plantar warts? I hear that they are caused by a virus. Does this mean my son isn't healthy? His doctor jokes and says he got it from stepping on frogs. What's the real answer?

A: As you suggested, your son did not get plantar warts from frogs. Plantar warts are caused by a virus, as are all warts. However, the source of the virus is usually not obvious. While sometimes there is another family member in the household who has a wart, very often there is no specific contact that can be identified.

Having warts does not mean that a child's immune system is weak. While the immune system is left to play a role in making warts go away, the vast majority of kids with warts of any kind have a normal immune system.

Warts are one of the most common skin complaints in childhood, occurring in 7 to 10 percent of all children. Plantar warts occur on the soles of the feet, usually on the weight bearing surfaces: heels, toes, and the ball of the foot. Because one is walking on them, they are pressed inward, and can become deep and painful. It is quite common for there to be several warts on one foot, a larger initial wart, and "baby" warts nearby.

Most warts will go away on their own eventually, without any therapy. However, this can take months to years and often people do not want to tolerate them for that long. Most of the treatments for warts are only partially effective. It is very difficult to remove the wart along with the small amount of virus that may be lingering on the skin, so it's common for them to recur. There are many topical irrritative treatments -- usually some sort of acid -- that can be applied over time; you have to be careful not to involve the surrounding normal skin. Liquid nitrogen treatments (freezing them), applied in the doctor's office, can be quite effective.

Laser therapy and surgery (cutting them out) are more involved treatments, but the likelihood of scarring is much higher with these than with the acid therapies. At times, it can be hard to justify the use of these methods, given that the wart is not causing any permanent harm, and any scar that is left would be lifelong.

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Shari Nethersole is a physician at Children's Hospital, Boston, and an instructor in Pediatrics at Harvard Medical School. She graduated from Yale University and Harvard Medical School, and did her internship and residency at Children's Hospital, Boston. As a pediatrician, she tries to work with parents to identify and address their concerns.


Please note: This "Expert Advice" area of FamilyEducation.com should be used for general information purposes only. Advice given here is not intended to provide a basis for action in particular circumstances without consideration by a competent professional. Before using this Expert Advice area, please review our General and Medical Disclaimers.

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