Electrocution produces a range of visible signs depending on the voltage, the type of current, and the path it takes through the body. At the moment of contact, muscles may lock up in an involuntary contraction so forceful the person cannot let go of the source. Afterward, the skin often shows distinctive burns at the points where current entered and exited, and in severe cases the damage extends deep into tissue and organs in ways that are not immediately visible from the outside. The picture varies enormously, from a small, almost unremarkable burn on a fingertip to catastrophic charring across large areas of skin.
The Moment of Contact
The most immediately visible sign of an ongoing electrical shock is involuntary muscle contraction. With alternating current (the kind that comes out of household outlets in most countries), a high enough current stimulates skeletal muscle cells as fast as they can respond, producing what is called a tetanic contraction. The muscles clamp down and stay clamped, which is why people sometimes grip a live wire and physically cannot release it. This looks like the person is frozen in place, often with their hand locked around the conductor, their body rigid, and their jaw clenched.
1PubMed Central. Conduction of Electrical Current to and Through the Human Body: A ReviewDirect current behaves differently. With DC, the feeling of shock tends to occur only at the moment of making or breaking the circuit, rather than continuously. That means a person who contacts a DC source might jerk away violently at the instant of contact, whereas someone touching an AC source is more likely to remain locked in place. This distinction matters because it changes what a bystander sees: a single convulsive flinch versus a sustained, frozen grip.
1PubMed Central. Conduction of Electrical Current to and Through the Human Body: A ReviewIf the current is strong enough to reach the heart, the consequences become invisible to a bystander but immediately life-threatening. With AC, the heart receives rapid repeated stimulation, and if the current amplitude is sufficient, ventricular fibrillation can occur. The heart stops pumping blood effectively. Respiratory arrest can also happen if current passes through the chest. Victims of electrical shock or lightning strike can experience cardiac and respiratory arrest from the direct effects of the current, though many survivors end up with a mix of neurological complications, burns, and injuries from being thrown or falling.
1PubMed Central. Conduction of Electrical Current to and Through the Human Body: A ReviewEntry and Exit Wounds on the Skin
After the event, the most recognizable visible evidence of electrocution is the “electric mark,” a burn at the site where current entered the body and another where it exited. These burns can range from subtle, almost invisible spots to deep, charred craters. The entry wound is typically found on the hand or finger that made contact with the source, while the exit wound appears wherever the body was grounded, often the feet, a knee, or another point of contact with a surface.
Classic entry marks tend to be small, dry, and crater-like with raised edges and a pale or yellowish center. Exit wounds can be more irregular and destructive, since the current may blow tissue outward as it leaves the body. In one forensic case report, an exit wound presented as a scorched area of peeling, blistering skin with charring and severe scorching over the lower back, a location and appearance that investigators initially found atypical until they reconstructed the circumstances of the accident.
2PubMed Central. The Investigation of an Accident Site With an Atypical Electrocution Exit Wound and Burn in an Unusual Location: A Rare Case Report and Review of LiteratureOne phenomenon that can occur at the contact site is metallization: tiny particles of the conductor material get deposited onto or into the skin. When a copper wire is involved, for instance, copper debris transfers to the surface of the wound. Forensic pathologists can detect these copper deposits using histological staining techniques, which helps confirm that a wound was caused by electrical contact rather than some other type of burn.
3PubMed. Death by electrocution: Histological technique for copper detection on the electric markHow Electrical Burns Differ from Flame Burns Under a Microscope
To the naked eye, an electrical burn can sometimes resemble a burn from fire or even an abrasion. This is a real problem in forensic investigations, especially when the circumstances of death are unclear. But under a microscope, electrical injuries have distinctive features that set them apart. The most telling sign is nuclear elongation in the epidermis, where cell nuclei in the outer layer of skin become stretched and elongated, oriented parallel to the surface. While this elongation can also appear to a lesser degree in flame burns and even contusions, it tends to be most severe in electrical injuries.
4PubMed. Histopathological differentiation of skin lesions caused by electrocution, flame burns and abrasionResearch into the mechanism behind this elongation points to heat causing dermal expansion. When current passes through the skin, it generates intense localized heat that causes the collagen fibers in the deeper layer of skin (the dermis) to denature and swell. This expansion physically stretches the cells above, pulling their nuclei into elongated shapes. In electrical injuries specifically, the elongation also tends to occur near hair follicle root sheaths, a detail that helps pathologists distinguish them from other thermal injuries.
5PubMed. A histological study on the mechanism of epidermal nuclear elongation in electrical and burn injuriesOther microscopic features include separation within the layers of the epidermis, separation between the epidermis and dermis, and coagulation necrosis, where tissue dies in a pattern consistent with heat damage. These features together form a kind of fingerprint that pathologists use to build a case when the cause of an injury or death is in question.
4PubMed. Histopathological differentiation of skin lesions caused by electrocution, flame burns and abrasionHigh-Voltage Arc Injuries and “Crocodile Skin”
High-voltage electrocution, typically from industrial equipment or power lines, creates a different and more dramatic picture than household-voltage injuries. At high voltages, an electric arc can jump across an air gap between the conductor and the body, producing an intensely hot plasma flash that does not even require direct contact. The resulting burns tend to be extensive and have characteristic patterns that forensic investigators recognize.
A review of deaths caused by high-voltage electric arcs at one forensic institute found that the most common visible injuries included extensive skin burns, a pattern of tightly spaced roundish burns described as “crocodile skin,” periorbital recesses sometimes called “crow’s feet” (burned depressions around the eyes from the flash), and metallization from vaporized conductor material depositing onto the skin. Among the high-voltage arc fatalities examined, the vast majority showed the crocodile-skin burn pattern.
3PubMed. Death by electrocution: Histological technique for copper detection on the electric markElectrical burns from high-voltage sources also tend to be deceptively deep. The surface damage can look manageable, but the current and heat often destroy muscle, blood vessels, and nerves underneath. One case report described a patient with an electrical burn covering roughly 11.5% of his total body surface area on the neck. The treatment required extensive surgical debridement and specialized wound reconstruction because the underlying tissue damage extended far beyond what was visible on the surface.
6PubMed Central. Reconstruction of Electrical Burn Wounds Using Acellular Dermal Matrix: A Case Report and Literature ReviewWhat Lightning Does to the Body
Lightning injuries deserve their own discussion because they look different from other electrical injuries and involve a unique set of visible signs. The current from a lightning strike is enormously high voltage but extremely brief, lasting only milliseconds. This means the energy tends to flash over the surface of the body rather than penetrating deeply the way sustained industrial current does. The results are often dramatic on the skin but may leave internal organs relatively spared compared to a prolonged high-voltage contact.
The most visually striking sign of a lightning strike is the Lichtenberg figure, a fractal, fern-like or branching pattern that appears on the skin. These marks are considered uniquely diagnostic of lightning injury; nothing else produces them. They are typically described as pink or red and transient, fading within hours to days. The underlying cause of these figures is still not fully understood, and their appearance can vary. In one autopsy case, a woman who died from a lightning strike during a thunderstorm was found five days later to have atypical green Lichtenberg figures on the skin of her abdomen, a highly unusual presentation.
7PubMed. Unusual Lichtenberg figures in a lightning strike’s victim: Case report and literature reviewLightning can also produce a temporary condition called keraunoparalysis, where one or more limbs become paralyzed, cold, pale, numb, and pulseless immediately after the strike. To a bystander, this looks alarming, as the affected limb appears lifeless and may resemble a vascular emergency. The condition is believed to result from massive overstimulation of the autonomic nervous system causing vasospasm in the limb’s blood vessels, rather than structural damage to nerves or muscles. It typically resolves within hours, though observers who are unaware of it may assume permanent injury.
8PubMed Central. Lightning‐Induced Keraunoparalysis and Rhabdomyolysis: A Case ReportThe reassuring feature of keraunoparalysis is that it is reversible. Case reports describe patients whose affected limbs returned to normal function within a few hours, with no lasting neurological deficit.
9PubMed Central. A Case of Keraunoparalysis: A Bolt from the BlueDamage You Cannot See from the Outside
Much of what electrocution does to the body is invisible on the surface. When current passes through internal tissues, it follows the paths of least resistance, which often means blood vessels, nerves, and muscles rather than skin. The resulting injuries may not manifest for hours or even days.
In the brain, high-voltage accidents can produce acute stroke, blood clots in cerebral veins from increased coagulation, swelling, hemorrhage from vasospasm, and degeneration and death of nerve fibers. These effects can cause neurological symptoms ranging from confusion and memory loss to seizures and coma, none of which are visible on the body’s exterior.
10PubMed Central. Electrocution Stigmas in Organ Damage: The Pathological MarksThe eyes are particularly vulnerable, though the damage often shows up long after the initial event. Electrical current that passes through or near the head can cause cataracts, sometimes appearing months or even decades later. In one case, a man developed a cataract in his left eye eight years after an electrical shock to his hand from a home appliance. The cataract had a distinctive “placoid” appearance on the front surface of the lens.
11Digital Journal of Ophthalmology. Electric shock–induced cataractAnother case documented a man who had been unconscious after an electrical shock and presented 27 years later with severely reduced vision in one eye due to electric cataract, along with irregular skin scars on his head and lower extremity that testified to the original injury.
12PubMed Central. Delayed-Onset Electric Cataract Following High-Voltage Electrical InjuryHigh-voltage injuries to the head can produce an even wider range of eye damage simultaneously. One report described a patient who developed cataracts in both eyes, a hole in the retina of one eye, and degeneration of the optic nerve in the other eye, all from a single high-voltage shock that passed through the temporal region of his head two months earlier.
13PubMed Central. Simultaneous Cataract, Maculopathy and Optic Atrophy Secondary to High-Voltage Electrical Shock InjuryJudicial Electrocution at Autopsy
One grim source of systematic data on what electrocution looks like comes from autopsies performed after judicial executions by electric chair. A review of 43 such autopsies found that the most common physical findings were a ring-shaped burn on the scalp under the head electrode and a burn on the right calf where the ankle electrode was placed. These burns corresponded directly to the path of current flow between the two electrodes. Beyond these predictable contact burns, autopsy findings varied, but the pattern of injury matched the same principles seen in accidental electrocution: the most severe visible damage occurs where current density is highest, at the entry and exit points.
14PubMed. Review of autopsy findings in judicial electrocutionsWhat Electrocution Looks Like in Birds
Humans are not the only species electrocuted by human infrastructure. Raptors, including eagles, hawks, and owls, are frequently killed when they perch on power poles and bridge the gap between conductors. A large retrospective review of 377 electrocuted birds found that the visible external evidence was often surprisingly subtle. Roughly one in five electrocuted birds had only a single small burn less than 3 centimeters across. These small burns tended to appear on the undersides of the wings near or below the elbow, or on the lower legs and feet, which are the points that make contact with the pole and the wire.
15PubMed. Electrocution of Raptors on Power Lines: A Review of Necropsy Methods and FindingsBeyond the external burns, necropsies of electrocuted raptors revealed skin lacerations, subcutaneous burns beneath the surface, bruising, and in some cases, hemopericardium (bleeding around the heart) and vascular rupture. Perhaps the most dramatic finding was limb avulsion, where the explosive muscular contraction or the arc itself tore a limb from the body entirely. These findings mirror the human experience: the visible surface damage often understates the severity of what happened internally. The fact that nearly a fifth of electrocuted birds had only a tiny burn on the outside underscores how deceptive electrocution injuries can be. A body may look nearly unharmed and yet have suffered fatal internal disruption.
15PubMed. Electrocution of Raptors on Power Lines: A Review of Necropsy Methods and Findings