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Living with Drug rash with eosinophilia and systemic symptoms

A rare, severe allergic reaction to a medicine that causes a rash, fever, and inflammation in organs like the liver, kidneys, and lungs.

Understanding Drug rash with eosinophilia and systemic symptoms

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a rare, severe allergic reaction to a medicine.

DRESS can cause a skin rash, fever, and inflammation in different parts of the body, such as the liver, kidneys, and lungs. In some people it can also reactivate human herpes virus 6. It usually happens 2 to 6 weeks after starting the medicine. It is often linked to anticonvulsants and sulfonamides, but other medicines can also cause it. It can happen at any time in life.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Skin rash
  • Fever
  • Widespread skin redness (erythroderma)
  • Swollen lymph nodes
  • Swelling under the skin (angioedema)
  • Weight loss

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include skin, hair, and nail specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    DRESS Syndrome Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: DRESS Syndrome Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with DRESS Syndrome Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which medicine likely caused this reaction, and should I avoid it in the future?
Which organs need to be checked or watched?
How should I list this reaction in my medical record?

Quick facts

Symptoms usually startany time in life

DRESS is a reaction to a medicine, usually 2 to 6 weeks after starting it. GARD names anticonvulsants and sulfonamides as common causes, and also allopurinol, cyclosporine, azathioprine, gold salts, and antivirals.

Skin

Also known as: anticonvulsant hypersensitivity syndrome; dhs; dress; dress syndrome; drug hypersensitivity syndrome; drug reaction eosinophilic systemic syndrome

Patient organizations

Source: NIH GARD · Drug rash with eosinophilia and systemic symptomsGARD ID 13629 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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