Toxic Epidermal Necrolysis: Symptoms, Emergency Care, Causes and Recovery
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Emergency notice: suspected toxic epidermal necrolysis is a medical emergency. If you or someone else has widespread skin pain, a rapidly spreading rash, blisters or large areas of peeling skin, or sores, swelling or crusting involving the mouth, eyes or vagina, seek immediate emergency medical attention. Call 911 or your local emergency number. Do not wait for an online diagnosis. Do not independently stop, restart or change a prescribed medicine; emergency clinicians must decide how to handle a suspected trigger medicine.
Quick Answer: What is toxic epidermal necrolysis?
Toxic epidermal necrolysis, or TEN, is a rare, life-threatening skin reaction usually caused by a medication. It can cause widespread skin pain, a spreading rash, blisters or peeling skin, and involvement of moist body linings such as the mouth, eyes and vagina. Suspected TEN needs immediate emergency medical attention and is usually treated in a hospital with supportive care. [4]
What the research says
No drug treatment has been clearly shown to beat good supportive care for survival. A systematic review and network meta-analysis of 67 studies (2,079 patients with TEN or SJS/TEN overlap) found that none of 10 systemic treatments was superior to supportive care in reducing mortality rates, and thalidomide was associated with a higher mortality rate (odds ratio 11.67, 95% CI 1.42 to 95.96). Combination corticosteroids plus intravenous immunoglobulin was the only treatment with a significant benefit on the SCORTEN-based standardized mortality ratio (0.53, 95% CI 0.31 to 0.93), and the authors noted heterogeneity and a lack of randomized trials (Tsai et al., J Am Acad Dermatol, 2021). [1]
Some therapies looked better than predicted, but the evidence is not strong enough for routine use. A SCORTEN-based meta-analysis pooled 38 studies (1,827 patients with SJS/TEN). Cyclosporine, etanercept and immunoglobulin plus corticosteroids were each associated with fewer deaths than predicted, but in the network meta-analysis no treatment achieved a significant reduction in the standardized mortality ratio. The authors concluded there was not sufficient evidence to recommend any of these widely in all patients (Torres-Navarro et al., J Eur Acad Dermatol Venereol, 2021). [2]
Genetic screening before certain medicines may help prevent some cases. A clinical review notes that SJS/TEN is linked to certain high-risk drugs and HLA genotypes, that its clinical hallmarks include fever and involvement of two or more mucous membranes (eyes, mouth and genitals), and that HLA genotype screening before prescribing carbamazepine and allopurinol may further reduce the incidence. It also stresses that evidence for immunomodulatory treatments remains limited by the lack of randomized trials (Thong, Asia Pac Allergy, 2023). [3]
What is toxic epidermal necrolysis?
Toxic epidermal necrolysis is a rare, life-threatening skin reaction. It is usually caused by a medication and is considered a severe form of Stevens-Johnson syndrome. TEN affects people of all ages and commonly requires hospital treatment. [4]
The condition can involve both the skin and moist linings of the body, called mucous membranes. These areas include the mouth, eyes and vagina. The illness can become dangerous because extensive skin injury may affect fluid balance, infection risk, breathing, vision and other aspects of health. [4]
Recovery is not immediate. The skin may take weeks to months to heal, and full recovery can take several months. Some people may have lasting skin, eye, vaginal, nail or emotional effects. [4] [5]
Toxic epidermal necrolysis at a glance
Question | Short answer |
What is TEN? | A rare, life-threatening skin reaction that is usually caused by a medication. |
What does it affect? | The skin and moist linings of the body, including the mouth, eyes and vagina. |
What are key symptoms? | Widespread skin pain, a spreading rash, blisters, peeling skin and mucous-membrane sores or swelling. |
When can it begin? | Symptoms are likely to appear one to four weeks after starting a new medicine. |
How is it defined? | Severe disease affecting more than 30% of the body in a person with Stevens-Johnson syndrome. |
Where is it treated? | In a hospital, sometimes in a burn center or intensive care unit. |
What is treatment focused on? | Supportive care while the skin heals, including fluids, nutrition, pain control, monitoring and specialist care. |
What should you do if it is suspected? | Seek immediate emergency medical attention; do not wait for an online diagnosis. |
What are the emergency warning signs?
Symptoms of TEN may include a combination of skin pain, spreading skin changes and mucous-membrane involvement. The symptoms can be severe and may progress quickly, so the correct response is emergency medical assessment rather than home observation. [4]
Seek immediate emergency medical attention for:
Widespread skin pain.
A rash spreading across more than 30% of the body.
Blisters or large areas of peeling skin.
Sores, swelling or crusting in the mouth.
Eye symptoms or eye involvement.
Sores, swelling or crusting involving the vagina.
Coughing or difficulty breathing along with severe skin or mucous-membrane symptoms.
A visual checklist can help explain why several body areas matter, but an image cannot confirm TEN. The condition requires assessment by emergency clinicians and may require a dermatologist and other specialists in a hospital.
How is TEN related to Stevens-Johnson syndrome?
Stevens-Johnson syndrome and TEN are part of the same severe skin-reaction spectrum. TEN is diagnosed when the disease is severe and affects more than 30% of the body in a person with Stevens-Johnson syndrome. Extensive damage to mucous membranes is also part of the description of TEN. [4]
Readers should not try to determine the percentage of skin affected at home. The distinction is made by healthcare professionals during an urgent medical assessment. Any rapidly spreading, painful skin reaction with blisters, peeling or mucous-membrane involvement warrants immediate emergency medical attention.
What causes TEN?
TEN is usually caused by a reaction to a medication. Symptoms are likely to start one to four weeks after a person begins taking a new drug. This timing is important information for emergency clinicians, but it does not prove that a particular medicine caused the reaction. [4]
The most common drug triggers of SJS/TEN include:
Medication group or medicine | How it is described |
Antibiotics | Listed among the most common drug triggers. |
Epilepsy drugs | Listed among the most common drug triggers. |
Sulfa drugs | Listed among the most common drug triggers. |
Allopurinol | Listed as a common drug trigger. |
If TEN is suspected, do not independently stop, restart or substitute a prescribed medicine. The emergency care team must review the medication history and decide what action is appropriate.
How soon can symptoms begin after a new medicine?
Symptoms are likely to begin one to four weeks after starting a new medicine. A person with concerning symptoms should tell emergency clinicians about every recently started or changed medicine, including the approximate start date if known. [4]
The timing alone cannot confirm TEN. Other conditions can cause rashes or mucous-membrane symptoms, and only an urgent clinical assessment can determine what is happening. Do not delay emergency care while trying to identify the medicine yourself.
Who may have a higher risk?
Toxic epidermal necrolysis (TEN) risk may be higher with HIV, a weakened immune system, cancer, a previous episode, a family history or certain genetic variations. These factors do not mean that a person will develop TEN, and they do not replace emergency assessment when symptoms appear. [4]
HIV infection. Among people with HIV, the incidence of SJS/TEN is about 100 times greater than in the general population.
A weakened immune system, including from an organ transplant, HIV/AIDS or autoimmune disease.
Cancer, especially blood cancers.
A previous episode of SJS/TEN. A medication-related episode can recur if the drug is taken again.
A first-degree family history, such as a parent or sibling with SJS/TEN.
Certain genetic variations, especially in people taking medicines for seizures, gout or mental illness.
A previous medication-related episode is especially important to report. Recurrence can be worse and life-threatening if the responsible medicine or a related medicine is taken again. [4]
What complications can TEN cause?
TEN can affect more than the skin. Some people have a higher complication risk, including people older than 70 and those with liver cirrhosis or metastatic cancer. [4]
Potential complication | What is described |
Sepsis | Bacteria enter the bloodstream and spread, potentially causing shock and organ failure. |
Lung involvement | May cause coughing, difficulty breathing or, in severe disease, acute respiratory failure. |
Visual impairment | May include dry eye, ingrown eyelashes, corneal scarring and, rarely, blindness. |
Permanent skin damage | May include bumps, scars, discoloration, hair loss or abnormal nail growth. |
Vaginal sores | May cause pain or, if untreated, vaginal fusion. |
Emotional distress | The illness can cause distress and long-term psychological impact. |
These risks are one reason suspected TEN requires immediate hospital evaluation and coordinated specialist care.
How is TEN diagnosed?
TEN is diagnosed when a person with Stevens-Johnson syndrome has severe disease affecting more than 30% of the body. The percentage is a clinical determination, not something a person should estimate from a photograph or online checklist. [5]
A hospital evaluation may involve emergency clinicians, a dermatologist and other specialists. The team considers the skin findings, mucous-membrane involvement, recent medication history and the person’s overall condition. This article cannot determine whether a particular rash is TEN.
If symptoms could represent TEN, seek emergency medical attention immediately. Do not wait for a scheduled appointment or attempt to confirm the condition through self-assessment.
How is TEN treated in hospital?
If clinicians suspect that a medicine caused TEN, it will be stopped as part of hospital care. The person is then usually moved to a hospital for treatment, possibly in a burn center or intensive care unit. The main treatment is supportive care while the skin heals, and full recovery can take several months. [5]
A hospital care plan may include:
Fluid replacement and nutrition: Skin loss can lead to loss of fluid, so the team may replace fluids and electrolytes and provide nutrition, including through a tube when needed.
Wound care: The care team may gently cleanse affected skin, use special dressings, and monitor for infection. Antibiotics may be given if needed.
Breathing help: Tests and procedures may be used to evaluate and keep the airway clear. Advanced disease may require intubation or mechanical ventilation.
Pain control: Pain medicine may be used to reduce discomfort. Mouth pain may be treated with a numbing mouthwash.
Eye care: Mild eye symptoms may be treated with preservative-free artificial tears. Corticosteroid eye drops may be used for eye inflammation, and an ophthalmologist may be involved.
These are descriptions of hospital care, not instructions for home treatment. Do not attempt to reproduce wound care, eye treatment, airway care or medication treatment without direct clinical supervision.
What medicines might the hospital team consider?
Treatment may include one or more systemic medicines, such as cyclosporine, etanercept or intravenous immunoglobulin. Further study is needed to determine whether these medicines provide benefit. Treatment choices must be made by the hospital team based on the person’s condition. [5]
There is no safe general medication plan for readers to follow online. Do not self-prescribe, borrow medicines, change doses or independently stop prescribed medicines.
What should happen after a medication-related episode?
If a medication caused TEN, the person will need to permanently avoid that medicine and related medicines. The medication history should be shared with every future healthcare provider. A medical alert bracelet or necklace, or an allergy passport, can help communicate the history in future care settings.
Because recurrence can be worse and life-threatening, the history should be treated as important long-term safety information. The treating team should explain what medicine or related medicines must be avoided. Readers should not create their own medication list or make changes without clinical guidance.
Recovery may involve more than the initial hospital stay. Ongoing concerns can include skin changes, eye problems, nail changes, vaginal symptoms, hair loss or emotional distress. Any follow-up plan should come from the person’s healthcare professionals.
Frequently asked questions
What is toxic epidermal necrolysis?
Toxic epidermal necrolysis, or TEN, is a rare, life-threatening skin reaction usually caused by a medication. It can affect the skin and mucous membranes such as the mouth, eyes and vagina.
Is toxic epidermal necrolysis an emergency?
Yes. Suspected TEN requires immediate emergency medical attention. A person should not wait for an online diagnosis or try to manage severe symptoms at home.
What are the early warning signs of TEN?
Warning signs include widespread skin pain, a spreading rash, blisters or large areas of peeling skin, and sores, swelling or crusting involving the mouth, eyes or vagina.
How is TEN related to Stevens-Johnson syndrome?
TEN is a severe form within the SJS/TEN spectrum. It is diagnosed when severe disease affects more than 30% of the body in someone with Stevens-Johnson syndrome.
What medicines can trigger TEN?
Common medication groups include antibiotics, epilepsy drugs and sulfa drugs. Allopurinol is also a common trigger. A healthcare professional must assess whether a medicine caused a reaction.
How soon can TEN begin after a new medicine?
Symptoms are likely to begin one to four weeks after starting a new medicine. This timing can help clinicians review the medication history, but it cannot confirm the diagnosis by itself.
Who may have a higher risk of SJS/TEN?
Risk factors include HIV infection, a weakened immune system, cancer (especially blood cancers), a previous episode, a first-degree family history and certain genetic variations.
How is TEN diagnosed?
TEN is diagnosed when severe disease affecting more than 30% of the body occurs in a person with Stevens-Johnson syndrome. This assessment must be made by healthcare professionals.
How is TEN treated?
TEN is usually treated in a hospital with supportive care while the skin heals. Care may include fluid replacement, nutrition, wound care, infection monitoring, breathing support, pain control and eye care.
How long can recovery from TEN take?
Recovery can take weeks to months, and full recovery can take several months. The timeline depends on the person’s illness and complications.
What complications can TEN cause?
Possible complications include sepsis, lung involvement, breathing failure, visual impairment, lasting skin damage, vaginal sores and emotional distress.
Should someone stop a prescribed medicine if TEN is suspected?
Do not independently stop, restart, substitute or change a prescribed medicine. Seek immediate emergency medical attention and let emergency clinicians review the medicine history and direct the medication decision.
How can another episode be prevented?
After a medication-related episode, the person should permanently avoid the responsible medicine and related medicines as directed by the healthcare team, tell all future healthcare providers about the history and consider carrying a medical alert bracelet, necklace or allergy passport.
Conclusion: treat suspected TEN as an emergency
Toxic epidermal necrolysis is a rare but life-threatening medication-related skin reaction. Widespread skin pain, a rapidly spreading rash, blisters or peeling skin, and mouth, eye or vaginal involvement are warning signs that require immediate emergency medical attention. Hospital teams provide supportive care, review possible medication triggers and monitor for serious complications.
The safest next step is not online self-diagnosis or independent medication changes. Seek emergency care, bring an accurate medication history if possible, and follow the care team’s instructions about medicines and follow-up.
References
Tsai TY, Huang IH, Chao YC, et al. Treating toxic epidermal necrolysis with systemic immunomodulating therapies: a systematic review and network meta-analysis. J Am Acad Dermatol. 2021;84(2):390-397. PMID: 32898587. DOI: 10.1016/j.jaad.2020.08.122
Torres-Navarro I, Briz-Redón Á, Botella-Estrada R. Systemic therapies for Stevens-Johnson syndrome and toxic epidermal necrolysis: a SCORTEN-based systematic review and meta-analysis. J Eur Acad Dermatol Venereol. 2021;35(1):159-171. PMID: 32946187. DOI: 10.1111/jdv.16685
Thong BY. Drug-induced Stevens Johnson syndrome and toxic epidermal necrolysis: interpreting the systematic reviews on immunomodulatory therapies. Asia Pac Allergy. 2023;13(2):72-76. PMID: 37388817. DOI: 10.5415/apallergy.0000000000000101
Mayo Clinic Staff. TEN: Symptoms and causes. Mayo Clinic. August 29, 2020. https://www.mayoclinic.org/diseases-conditions/toxic-epidermal-necrolysis/symptoms-causes/syc-20491903
Mayo Clinic Staff. TEN: Diagnosis and treatment. Mayo Clinic. August 29, 2020. https://www.mayoclinic.org/diseases-conditions/toxic-epidermal-necrolysis/diagnosis-treatment/drc-20491915
Disclaimer
This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition.
It does not diagnose, prescribe or replace emergency medical care. Suspected toxic epidermal necrolysis needs immediate emergency medical attention.
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