After getting an electrical shock, your first priority is making sure the power source is no longer a threat, then assessing whether you or the injured person needs emergency care. Even a shock that feels minor can cause internal damage that isn’t visible on the skin, so knowing what to watch for in the hours and days afterward matters just as much as the immediate response.
Secure the Scene First
Before touching anyone who has been shocked, make sure they are no longer in contact with the electrical source. Turn off the power if you can reach the breaker or unplug the device safely. If you can’t cut the power, use a dry, non-conducting object like a wooden broom handle, plastic chair, or piece of cardboard to push the electrical source away from the person. Never touch someone who is still in contact with a live current.
For downed power lines or high-voltage equipment, stay at least 20 feet away, farther if wires are sparking or jumping. Overhead power lines are typically not insulated, and the ground around them can be electrified. Call 911 and wait for the utility company to cut power before anyone approaches.
Don’t move someone who has been shocked unless they’re in immediate danger, such as near a fire or in water. Electrical injuries can cause broken bones and dislocated joints from severe muscle spasms, and moving the person could make those injuries worse.
When to Call 911
Any shock from a high-voltage source (generally above 1,000 volts, which includes power lines, industrial equipment, and lightning) requires emergency care, no exceptions. Lightning strikes always need emergency treatment, even if the person appears fine initially.
For lower-voltage shocks, including household current (120 or 240 volts in the U.S.), call 911 if the person experiences any of these symptoms:
- Chest pain or irregular heartbeat
- Difficulty breathing
- Loss of consciousness, even briefly
- Seizures
- Burns on the skin, especially at entry and exit points
- Numbness, tingling, or muscle spasms that don’t resolve quickly
- Confusion or vision and hearing changes
- Abdominal pain
If someone is unresponsive and has no pulse, begin CPR immediately while waiting for emergency services.
Why a “Minor” Shock Can Still Be Serious
One of the most dangerous things about electrical injuries is that what you see on the outside often doesn’t match what’s happening inside. Electricity travels through the body along the path of least resistance, damaging muscles, blood vessels, and nerves along the way. The skin might show small burns at the entry and exit points, or no visible marks at all, while internal tissue has sustained significant injury.
When skin resistance is low (wet hands, for example), more electrical energy passes into the body’s interior rather than burning the surface. This means the absence of burns does not rule out internal damage. Severe muscle injury from electrical current can trigger a condition called rhabdomyolysis, where damaged muscle fibers break down and release proteins into the bloodstream that can overwhelm the kidneys. At the hospital, blood tests measuring muscle enzyme levels help detect this, even when external injuries appear minimal.
Electricity can also cause blood clots, tissue swelling severe enough to cut off circulation in a limb, and direct damage to organs in the current’s path.
The Heart Risk That Shows Up Later
The most concerning delayed effect of an electrical shock is a heart rhythm disturbance. While most people who develop cardiac problems after a shock show abnormalities on their initial heart tracing, documented cases show dangerous rhythms appearing hours or even days later.
In one reported case, a 24-year-old man shocked by household-level current (220 to 240 volts) had a mildly abnormal heart tracing 45 minutes after the injury. Two hours later, his rhythm worsened. The next day, his heart’s electrical system failed further, and six hours after that, he went into a life-threatening rhythm that required emergency resuscitation. In another case involving a higher-voltage injury, a 43-year-old electrician collapsed 12 hours after a 3,000-volt shock while playing football.
This is why emergency departments typically perform a heart tracing after any significant electrical shock. If that initial reading is normal after a low-voltage injury, it’s generally a reassuring sign. But if you were shocked and start feeling palpitations, chest tightness, dizziness, or fainting in the hours or days that follow, get to an emergency room immediately.
What to Watch for in the Days and Weeks After
Even after you’ve been evaluated and cleared, some symptoms can develop on a delayed timeline. Nerve damage is one of the more common lasting effects of electrical injury. This can show up as numbness, tingling, burning sensations, or weakness in the arms or legs. Studies tracking electrical injury survivors found increased rates of nerve problems in individual limbs, nerve root disorders, and disturbances in skin sensation. Most of these issues appear within the first six months, though onset has been documented up to five years later in some cases.
Pay attention to any new neurological symptoms in the weeks following a shock: persistent tingling or numbness, unexplained pain, difficulty with coordination, or changes in memory and concentration. These warrant a follow-up visit with your doctor, even if your initial evaluation was normal.
Pregnant and Got Shocked
Electrical shock during pregnancy carries uncertain but real risks. The clinical outcomes range from a brief unpleasant sensation with no effect on the fetus to fetal death occurring immediately or days later. The severity depends on factors like how much current passed through the body, how long the contact lasted, and whether the current’s path crossed the abdomen. If you’re pregnant and experience any electrical shock beyond a brief static discharge, seek medical evaluation. Fetal monitoring can detect problems that you wouldn’t otherwise feel.
Preventing the Next Shock
Most household shocks are preventable. GFCI outlets (the ones with “test” and “reset” buttons, typically found in kitchens, bathrooms, and outdoor areas) are designed to cut power when they detect a current imbalance of just 5 milliamps, well below the level that causes serious injury. If your home has older outlets in wet areas without GFCI protection, replacing them is one of the most effective safety upgrades you can make.
Other basics that prevent most household shocks: replace any cord with damaged insulation, don’t use electrical devices near standing water, and never attempt electrical repairs without turning off the breaker first. If a breaker trips repeatedly, that’s a warning sign of a wiring problem that needs professional attention, not a nuisance to override.