Electrical Injury
Damage from electric current passing through the body
Quick Facts
- Type: Traumatic injury / burn
- Main dangers: Heart rhythm problems, deep burns
- Emergency: Always call emergency services
- Hidden risk: Internal damage with little surface injury
Overview
An electrical injury happens when an electric current passes through the body. It can result from contact with household electricity, high-voltage power lines, electrical equipment, or a lightning strike. The severity depends on the type and strength of the current, the path it takes through the body, and how long the contact lasts.
Electrical injuries are unpredictable. A person may have only a small mark on the skin yet have serious internal damage, because electricity can injure muscles, nerves, blood vessels, and the heart along its path. Any significant electric shock should be treated as a potential emergency.
Symptoms
Symptoms range from mild and temporary to life-threatening. They may include:
- Burns at the entry and exit points where the current passed
- Muscle pain, spasms, or contractions
- Numbness, tingling, or weakness
- Irregular heartbeat, chest pain, or palpitations
- Confusion, headache, or loss of consciousness
- Difficulty breathing
- Seizures or, in severe cases, cardiac arrest
Some effects, especially heart rhythm problems, can appear or worsen in the hours after the shock, even when the person seemed fine at first.
Causes
Electrical injuries occur when the body becomes part of an electrical circuit. Common causes include:
- Household electricity: Faulty wiring, damaged cords, or contact with outlets and appliances
- Workplace hazards: Contact with high-voltage equipment or power lines
- Lightning strikes: A very high-voltage, brief exposure that can affect the heart and nervous system
- Water and electricity together: Wet conditions greatly increase the risk and severity of shock
High-voltage sources and lightning tend to cause the most severe injuries, but even household current can be dangerous, particularly across the chest or in wet conditions.
Risk Factors
- Jobs involving electricity, such as electricians, utility, and construction workers
- Working with electrical equipment in wet or damp conditions
- Damaged cords, outlets, or wiring at home
- Young children, who may bite cords or insert objects into outlets
- Outdoor activity during thunderstorms
- Do-it-yourself electrical work without proper precautions
Diagnosis
After a significant electrical injury, medical evaluation looks for both visible and hidden damage.
- Physical examination: Checking burns, entry and exit wounds, and nerve and muscle function.
- Heart monitoring (ECG): Looking for dangerous heart rhythm changes, which can occur after current crosses the chest.
- Blood and urine tests: To detect muscle breakdown and kidney strain that deep electrical injury can cause.
- Imaging: To assess internal injuries, fractures from falls or muscle contractions, or deep tissue damage.
Treatment
Treatment depends on severity but begins with making the scene safe and getting emergency help.
- Do not touch a person still in contact with a live source. Turn off the power if possible, and call emergency services.
- Emergency care: Severe shocks may require resuscitation, heart monitoring, and treatment of burns and other injuries.
- Burn care: Cleaning, dressing, and sometimes surgery for deep burns.
- Fluids and monitoring: Used to protect the kidneys when there is significant muscle damage.
- Observation: People with notable shocks may be watched for delayed heart rhythm problems.
Minor shocks with no symptoms and only a small surface burn may need only basic wound care, but any chest-area shock, loss of consciousness, or persistent symptoms requires medical evaluation.
Prevention
Most electrical injuries are preventable with safety precautions:
- Repair or discard damaged cords, plugs, and appliances
- Use outlet covers and keep cords out of reach of young children
- Keep electrical devices away from water and never use them with wet hands
- Install ground-fault outlets in kitchens, bathrooms, and outdoors
- Hire qualified electricians for wiring work
- Stay indoors and avoid water and metal during thunderstorms
When to See a Doctor
Call emergency services immediately for any high-voltage shock, lightning strike, loss of consciousness, chest pain, irregular heartbeat, trouble breathing, seizures, or severe burns. Do not touch a person who is still in contact with a live electrical source.
Even after a seemingly minor shock, seek medical care if there is a burn that is more than superficial, numbness or weakness, muscle pain, or any chest symptoms, since the current may have caused internal or heart-related damage that is not visible on the surface.
Frequently Asked Questions
Can a small electric shock be dangerous?
It can. Electricity can cause internal damage to muscles, nerves, and the heart even when the skin shows only a small mark. Any shock that crosses the chest, causes loss of consciousness, or leaves lasting symptoms should be evaluated.
What should I do if someone is being shocked?
Do not touch them while they are still in contact with the source, as the current can pass to you. Turn off the power if you safely can, call emergency services, and only help once the person is clear of the source.
Why do doctors monitor the heart after a shock?
Electric current passing through the chest can disturb the heart's rhythm, sometimes hours later. Heart monitoring (an ECG) helps detect dangerous rhythms so they can be treated promptly.
Are electrical burns different from other burns?
Yes. Electrical burns often look small on the surface but can cause extensive damage deep in the tissue along the current's path. This is why they need careful medical assessment.
When is an electrical injury an emergency?
Call emergency services for any high-voltage shock or lightning strike, and for loss of consciousness, chest pain, irregular heartbeat, trouble breathing, seizures, or severe burns. Never touch someone still in contact with a live source.
References
- American Burn Association. Electrical Injury.
- Mayo Clinic. Electric shock: First aid.
- MedlinePlus, U.S. National Library of Medicine. Electrical injury.
- Centers for Disease Control and Prevention (CDC). Lightning Safety.