Buckle (Torus) Fracture of an Arm

Your child has a broken bone (fracture) in the forearm (radius or ulna bone). This is a very common fracture in children. Because of a child’s softer bones, one side of the bone might buckle or bend without any break in the other side. This injury is also called an incomplete fracture for this reason. It’s also called a torus fracture.

These fractures heal faster than complete fractures. But your child will need to wear a splint or cast for at least 3 weeks. It may take 6 to 8 weeks for the fracture to heal.

Home care

Follow these guidelines when caring for your child at home:

  • Your child will be given a splint or cast to keep the arm from moving. Keep your child's arm elevated to reduce pain and swelling. When your child is sitting or lying down, keep the arm above heart level. You can do this by placing the arm on a pillow that rests on your child’s chest or on a pillow at your child's side. This is most important during the first 2 days (48 hours) after the injury. Be sure that the pillows don't move near the face of an infant or toddler. Never leave your child unsupervised.

  • Put an ice pack on the injured area. Do this for 20 minutes every 1 to 2 hours the first day for pain relief. You can make an ice pack by putting ice cubes in a plastic bag that seals at the top. Wrap the bag in a thin towel or cloth before using it. As the ice melts, be careful that the cast or splint doesn’t get wet. You can put the ice pack inside the sling and directly over the splint or cast. Keep using the ice pack 3 to 4 times a day for the next 2 days. Then use it as needed to ease pain and swelling.

  • Keep the cast or splint completely dry at all times. Have your child bathe with the cast or splint out of the water. Protect it with a large plastic bag, taped or rubber-banded at the top end. If a fiberglass cast or splint gets wet, you can dry it with a hair dryer on the cool setting.

  • You may give your child acetaminophen or ibuprofen to control pain, unless another pain medicine was prescribed. If your child has chronic liver or kidney disease, talk with the healthcare provider before using these medicines. Also talk with the provider if your child has had a stomach ulcer or gastrointestinal bleeding. Don’t give ibuprofen to a child younger than 6 months of age.

  • Don’t put creams, lotions, or objects under the cast. If itching doesn't stop, call your provider.

Follow-up care

Follow up with your child’s healthcare provider as advised. This is to make sure the bone is healing the way it should. If your child was given a splint, it may be changed to a cast at the follow-up visit.

When to get medical advice

Call your child’s healthcare provider right away if any of these occur:

  • The cast or splint cracks

  • The plaster cast or splint becomes wet or soft

  • The fiberglass cast or splint stays wet for more than 24 hours

  • Tightness or pain under the cast or splint gets worse

  • Fingers become swollen, cold, blue, numb, or tingly

  • Your child can’t move the fingers on the injured arm

  • Skin around the cast becomes red, swollen, or irritated

Also call your child’s provider right away if your child has a fever (see "Fever and children" below) or chills.

Fever and children

Use a digital thermometer to check your child’s temperature. Don’t use a mercury thermometer. There are different kinds and uses of digital thermometers. They include:

  • Rectal. For children younger than 3 years, a rectal temperature is the most accurate.

  • Forehead (temporal). This works for children ages 3 months and older. If a child younger than 3 months old has signs of illness, this can be used for a first pass. The provider may want to confirm with a rectal temperature.

  • Ear (tympanic). Ear temperatures are accurate after 6 months of age, but not before.

  • Armpit (axillary). This is the least reliable, but may be used for a first pass to check a child of any age with signs of illness. The provider may want to confirm with a rectal temperature.

  • Mouth (oral). Don’t use a thermometer in your child’s mouth until they are at least 4 years old.

Use the rectal thermometer with care. Follow the product maker’s directions for correct use. Insert it gently. Label it and make sure it’s not used in the mouth. It may pass on germs from the stool. If you don’t feel OK using a rectal thermometer, ask the healthcare provider what type to use instead. When you talk with any healthcare provider about your child’s fever, tell them which type you used.

Below are guidelines to know if your young child has a fever. Your child’s healthcare provider may give you different numbers for your child. Follow your provider’s specific instructions.

Fever readings for a baby younger than 3 months old:

  • First, ask your child’s healthcare provider how you should take the temperature

  • Rectal or forehead: 100.4°F (38°C) or higher

  • Armpit: 99°F (37.2°C) or higher

Fever readings for a child ages 3 months to 36 months (3 years):

  • Rectal, forehead, or ear: 102°F (38.9°C) or higher

  • Armpit: 101°F (38.3°C) or higher

Call the healthcare provider in these cases:

  • Repeated temperature of 104°F (40°C) or higher in a child of any age

  • Fever of 100.4°F (38°C) or higher in baby younger than 3 months

  • Fever that lasts more than 24 hours in a child younger than age 2

  • Fever that lasts for 3 days in a child age 2 or older

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