Stevens-Johnson Syndrome - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A rare, serious disorder affecting the skin and mucous membranes, usually triggered by medication or infection. It's a medical emergency.
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Quick Answer
Stevens-Johnson Syndrome (SJS) is a rare, life-threatening skin condition that requires immediate emergency hospital care. It is typically triggered by a severe reaction to certain medications, beginning with flu-like symptoms before rapidly progressing into a painful, spreading red or purple rash. This is followed by severe blistering that affects the skin and mucous membranes, including the eyes, mouth, and genitals. Because SJS causes the skin to peel, it must be treated in an intensive care or burn unit. Never wait to seek emergency medical attention.
Clinical Context
Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) represent a spectrum of severe mucocutaneous reactions, primarily drug-induced. SJS involves <10% body surface area (BSA) detachment, SJS-TEN overlap 10-30%, and TEN >30%. Incidence is 1-6 per million annually with mortality of 1-5% for SJS and up to 30% for TEN. Medications are implicated in 80% of cases, with highest risk in first 8 weeks. Certain HLA types (HLA-B*5801 for allopurinol, HLA-B*1502 for carbamazepine in Asians) increase susceptibility. This is a dermatologic emergency requiring immediate hospitalization.
Symptoms
- Flu-like symptoms initially
- Painful skin
- Purple or red rash that spreads
- Blisters on skin and mucous membranes
- Skin sloughing
- Eye, mouth, genital involvement
Severity & Progression
Causes & Risk Factors
- Medications (antibiotics, anticonvulsants, NSAIDs, allopurinol)
- Infections
- May be idiopathic
Treatment & Management
SJS/TEN is a medical emergency requiring immediate hospitalization, ideally in a burn unit or ICU. The causative drug must be stopped immediately - early withdrawal improves survival. Supportive care includes fluid and electrolyte management, nutritional support, wound care with non-adherent dressings, and temperature regulation. Ophthalmology consultation is mandatory as eye involvement can cause blindness. Pain management is critical. Specific therapies (IVIG, cyclosporine, etanercept) are used in some centers though evidence is mixed. Long-term follow-up addresses scarring, dry eyes, and psychological impact.
- EMERGENCY - immediate hospitalization
- Stop causative medication
- Burn unit or ICU care
- Fluid and electrolyte management
- Wound care
- Ophthalmology consult
Red Flags & Complications
Seek medical attention if you experience any of the following:
- Death (1-5% SJS, up to 30% TEN)
- Permanent scarring
- Eye complications (dry eye, scarring, blindness)
- Oral and esophageal strictures
- Genital scarring
- Psychological trauma and PTSD
- Chronic pain syndromes
Self-Care Tips
- SJS/TEN requires hospital care - no self-care is appropriate
- After recovery, carry a medication allergy card
- Never take the causative medication again
- Alert all healthcare providers to your drug allergy
- Consider wearing a medical alert bracelet
- Seek psychological support if needed
When to See a Doctor
EMERGENCY - seek immediate medical attention for widespread rash with blistering and mucosal involvement
Frequently Asked Questions
What are the very first signs of SJS before the rash appears?
Before the characteristic skin blistering begins, Stevens-Johnson Syndrome usually starts with flu-like symptoms. You might experience a fever, sore throat, cough, and burning or red eyes. A painful red or purple rash typically develops shortly after, which quickly spreads and forms painful blisters on the skin, mouth, eyes, or genitals. If you develop these symptoms after starting a new medication, seek emergency care immediately.
Which medications are most likely to cause this reaction?
SJS is most commonly triggered by medications, especially within the first four to eight weeks of starting them. High-risk drugs include certain antibiotics, anticonvulsants for seizures, pain relievers like NSAIDs, and allopurinol, which is used for gout. Sometimes, viral or bacterial infections can also trigger the condition. If you develop a severe rash while taking new medicines, stop taking them and go to the emergency room.
Can I just go to urgent care if I think I have SJS?
No, you should go straight to the nearest hospital emergency room. Stevens-Johnson Syndrome is a life-threatening medical emergency perfectly suited for a hospital level of care. It progresses extremely rapidly, causing the skin to shed, which leaves the body vulnerable to severe infections, extreme pain, and dehydration. Patients with SJS almost always require specialized treatment in an intensive care unit or a burn unit.
What is the difference between SJS and Toxic Epidermal Necrolysis (TEN)?
Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis are essentially the same condition, just at different levels of severity based on how much skin is affected. SJS involves blistering and peeling on less than 10 percent of the body surface. When the skin detachment covers more than 30 percent of the body, it is classified as TEN. Both are critical emergencies, but TEN carries an even higher risk of complications and mortality.
How do doctors treat SJS once I am in the hospital?
The very first step is stopping the medication that triggered the reaction. Treatment then focuses on critical supportive care, often in a burn unit. Doctors will administer intravenous fluids to prevent dehydration, aggressively manage pain, and apply specialized wound dressings on blistered skin. An ophthalmologist will frequently check your eyes to prevent permanent vision damage. Medical teams work around the clock to prevent infections while the skin heals.
What are the long-term effects after recovering from SJS?
Recovery can take weeks or months. While the skin does eventually heal, survivors may experience long-term complications. These can include permanent scarring, changes in skin color, and chronic pain. If the mucous membranes were severely affected, patients might suffer from persistent dry eyes, vision problems, or scarring in the mouth, esophagus, or genital areas. Psychological impacts, such as post-traumatic stress disorder, are also common after such a severe illness.
Am I at a higher risk of getting SJS than someone else?
Certain factors can increase your susceptibility. Having a weakened immune system, particularly from conditions like HIV/AIDS, significantly increases the risk. Additionally, variations in specific genes make some individuals, particularly those of Asian descent, more prone to SJS when taking drugs like allopurinol or carbamazepine. If you have had SJS before, you must strictly avoid the culprit medication for the rest of your life.
Can ScanSkinAI tell me if my rash is Stevens-Johnson Syndrome?
ScanSkinAI is a digital screening aid designed to help track and evaluate skin concerns, but it cannot diagnose Stevens-Johnson Syndrome or any other condition. SJS is an acute, life-threatening emergency. If you have a rapidly spreading, painful rash, blisters in your mouth or eyes, and flu-like symptoms, do not wait for an app evaluation. You must seek immediate emergency medical evaluation at a hospital.
Related Conditions
Medical References
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.