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from the American Academy of Orthopaedic Surgeons

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Lawn Mower Injuries in Children

Many homeowners have gas-powered or electric lawn mowers. Because lawn mowers are easy to use, children and adolescents are often given the responsibility of mowing the lawn.

Although mowing the lawn may seem like a routine chore, both push and riding lawn mowers are powerful machines with the potential to cause severe, and possibly life-threatening, injuries. Contact with the moving blades or the engine can result in a wide range of injuries, including burns, broken bones, and even amputation.

The American Academy of Orthopaedic Surgeons recommends children be at least 12 years old before operating a push mower, and 16 years old before using a riding lawn mower. 

Risk for Injury

In 2019, more than 77,000 adults and 3,000 children in the U.S. were treated in emergency departments for injuries related to lawn mowers, according to the U.S. Consumer Product Safety Commission. Boys sustain the vast majority of lawn mower injuries, which most often occur on the arms or hands.

Riding lawn mowers cause more injuries each year than push mowers because they can tip and even roll over, placing a child at risk of being run over and severely injured. 

Types of Injuries


The sharp blades of a mower can injure the skin or go deeper into the muscles, ligaments, tendons, and bones. Cuts from lawn mowers can occur anywhere on the body but most often occur on the hands and feet, which can most easily get past the blade protectors. 

Lawn mower injury

A child receiving treatment in the emergency room for a cut from a lawn mower.


The hot engine or gas tank of a lawn mower, or the exhaust from a gas-powered mower, can cause burns. Burns can happen anywhere on the body. They can damage the skin or go deeper into the tissues injuring muscles, ligaments, tendons, and bones.

Broken Bones (Fractures)

The sharp, rotating blades of a mower can cause broken bones.

Open fractures — in which the skin over a broken bone is cut or torn — are very common in lawn mower injuries. In addition to the broken bone, open fractures can cause serious injury to the surrounding muscles, tendons, and ligaments, and increase the likelihood of infection and other complications in the wound and the bone. As a result, the treatment and recovery time is greater for an open fracture than it is for a closed fracture in which the skin is not cut.


In addition to causing cuts and tears, the sharp blades of a mower can sever part of an arm, leg, hand, or foot. Burns, cuts, and fractures can be so severe that the injured part of the body requires amputation to prevent infection and further complications. 

First Aid Treatment

Immediately after a lawn mower accident, make sure the child is safe from further harm. Then, call emergency medical services (911 in most areas of North America), or bring the child to a doctor or emergency room.

Before the child is transported to a hospital or medical center, try to identify and stabilize the injury. 


  • An open wound can be covered lightly with a clean, dry bandage or cloth.
  • If there is bleeding, apply gentle, direct pressure to the wound.
  • Raising the child's arm above the heart will help minimize bleeding.


  • If you think there might be a broken bone, it is best not to move the limb until help arrives or until you can make a splint to hold the bone. 
  • If a broken bone is sticking out of the skin (open fracture), do not push the bone back in.


  • If there has been an amputation, the separated body part should be brought to the hospital with you. In some cases the doctor may be able to reattach it.
  • Wrap the amputated part in a clean, damp bandage, and seal it in a plastic bag. Put the plastic bag in a container of water mixed with some ice. Be careful not to freeze the part — just keep it very cool.

Doctor Examination and Tests

In the emergency room or doctor's office, the doctor will conduct a comprehensive examination of the injury and assess soft tissue, nerve, and blood vessel damage. They will also check for additional injuries.

Depending on the severity of the injury, the doctor may start antibiotic treatment to prevent infection. A tetanus shot may also be required.

If the doctor suspects a bone is broken, X-rays will be necessary. X-rays provide images of dense structures like bone; they can show your doctor whether there is a fracture and, if so, how complex it is.

Findings from the examination and any tests will help the doctor determine a treatment plan to promote healing and future function. 


Some injuries can be treated in the emergency department and the child can go home the same day. More serious injuries may require admission to a hospital for days, weeks, or even months. Severe injuries may require one or more surgeries.


  • Mild cuts may only need cleaning and bandaging.
  • More serious cuts that are deeper or involve muscles, tendons, or ligaments may require cleaning. This involves using saline or another solution to wash out debris and bacteria to prevent infection. This procedure can take place in either the emergency department or operating room.
  • Depending on how much skin and tissue is lost, a cut may require surgery to ensure healing. During surgery, torn structures can be repaired and, sometimes, a piece of skin (skin graft) may be taken from another area of the body and used to cover the injury.


  • Severe burns may require surgery and treatment from a burn surgeon.
  • If a wound is contaminated with grass, clothing, or other material, it may require more than one operation to avoid infection and ensure that the wound is clean enough to heal. 


Broken bones can sometimes be treated with just a cast or splint. If the bones are in a poor position and do not line up properly to heal, the doctor may have to move or realign them before placing a cast or splint over the injured area.

Open fractures

  • If the skin is open over a broken bone and the bone is exposed, the injury needs to be cleaned and irrigated before surgery to fix the fracture.
  • During surgery, the broken bones are put back into place and then fixed using devices like wires, screws, plates, or rods. This type of procedure is called internal fixation.
  • Sometimes an external fixator is used to secure the bones when damage to the skin and soft tissues prohibits an internal fixation. An external fixator is a metal frame that holds the broken bones in place with small pins that go through the skin and into the bone above and below the break. 
External fixation

(Left) This child's open fracture has been treated with external fixation. (Right) There are different types of external fixators. Depending on the injury, a circular external fixator, like the one shown here, may be used.

(Right) Courtesy of Texas Scottish Rite Hospital for Children

Growth plate fractures

When a child breaks a bone, there can be injury to the growth plate (physis). Growth plates are areas of developing cartilage tissue near the ends of long bones. These plates regulate and help determine the length and shape of mature bone.

When a growth plate is severely injured, it can slow or stop growth in the bone. This can cause differences in the length or the size of limbs. Damaged growth plates also can cause limbs to grow crooked. 

  • Many growth plate fractures can be treated with cast immobilization, but surgical treatment may be necessary.
  • Growth plate fractures require regular follow-up visits with your doctor to ensure proper long-term results. 
Growth plate fracture treated with internal fixation

This fracture of the thighbone (femur) goes through the growth plate and down into the knee joint. The fracture is fixed in place with screws to restore normal joint alignment.


  • If part of a limb is amputated or nearly amputated, the surgeon will decide if the injured part can be reattached.
  • If the body part has been detached for too long, or if the injury is too severe, reattachment may not be possible.

Severe Injuries

Severe injuries may require reconstructive surgery.

  • In these procedures, the surgeon may need to shift healthy bones, muscles, tendons, or skin to new positions where they can compensate for body parts that are missing or working poorly.
  • Depending on the type of injury, reconstructive procedures can be performed within days or weeks of the initial treatment, or it may be months before reconstructive surgery is recommended.

Reconstructive surgery can improve the way the body works and how it looks. It typically requires a team approach with orthopaedic surgeons working alongside plastic surgeons and vascular surgeons to ensure the best possible outcome. 


Because of the severity of lawn mower injuries, they may take longer to heal than other injuries. In addition, the body may look and function differently after these injuries. Many complications can occur, including:

  • Infection of the wound
  • Loss of sensation (feeling on the skin) or strength
  • Adhesions (fused skin, muscle, tendons, or ligaments)
  • Decreased motion
  • Slow fracture healing (delayed union)
  • Lack of fracture healing (nonunion)
  • Healing with the bones in a poor position (malunion)


Depending on the severity of the injury, it may take days, weeks, months, or even years to heal from a lawn mower injury. Physical rehabilitation aids the healing process although most injured limbs need a period of rest before the start of a consistent rehabilitation regimen. There are many aspects of a comprehensive rehabilitation program.

Physical Therapy

Some children need to do special exercises to improve strength, joint motion, and flexibility. These exercises are often done with a physical therapist.

Strategies for Living with the Injury

Some injuries may make school and home activities difficult. In these cases, children usually can learn to do daily activities in different ways, often with the guidance of an occupational therapist.


Children who have had an amputation may need a prosthesis, which is an artificial replacement for the body part that is missing (arm, leg, hand, foot). These devices are custom-made by a prosthetist.

Assistive Devices

Casts, splints, slings, crutches, walkers, or wheelchairs may be required to protect the injured area while it heals.

Learn more: About Casts (video)

Learn more: How to Use Crutches, Canes, and Walkers

Regular Check-ups

Once the injuries have healed, your doctor may continue to do regular check-ups every few months or years. This is to ensure that function, appearance, and growth are improving and maintained. 


How well the body works and how the child and family feel about the appearance of the injured body part depends on the severity of the injury. Some children will heal without any scars, while other children may have a permanent disability. The best solution to this devastating problem is to be aware of the danger of lawn mowers and to prevent these injuries from happening. 


Fortunately, most lawn mower injuries can be prevented. The list below provides some useful guidelines for staying safe around lawn mowers. Most important, both adults and children must be aware of a lawn mower's inherent dangers.

  • Only use a mower that has protection over hot and sharp parts.
  • Riding mowers should have the reverse switch behind the driver, forcing the driver to look behind when placing the machine in reverse.
  • Push mowers should have a control that stops forward motion when the handle is released.
  • If children must be in the yard during mowing, they should remain at least 20 feet away from the running lawn mower at all times. Ideally, children should not be allowed outside in the yard when the grass is being cut.
  • Children should be at least 12 years old before operating a push lawn mower, and 16 years old to operate a riding lawn mower.
  • Children should never be passengers on ride-on mowers.
  • Always wear sturdy, closed-toed shoes while mowing the lawn — do not wear sandals.
  • Remove stones, toys, and debris from the lawn before mowing to prevent injuries from flying objects.
  • Always wear eye and hearing protection.
  • Make sure the mower is off and cooled down before attempting to make any repairs or adjustments.
OrthoKids link

Learn more about this topic at POSNA's OrthoKids website:

Lawnmower Safety

Last Reviewed

April 2022

AAOS does not endorse any treatments, procedures, products, or physicians referenced herein. This information is provided as an educational service and is not intended to serve as medical advice. Anyone seeking specific orthopaedic advice or assistance should consult his or her orthopaedic surgeon, or locate one in your area through the AAOS Find an Orthopaedist program on this website.