Is Sweet Syndrome contagious?

Sweet Syndrome, also known as acute febrile neutrophilic dermatosis, is not contagious and cannot be spread from person to person through touch, saliva, or any other form of contact. It is a rare inflammatory condition, not an infectious disease, meaning there is zero risk to family members, caregivers, or friends who interact with those living with the syndrome.

What is the underlying cause of Sweet Syndrome?

Sweet Syndrome is classified as an inflammatory skin condition, not an infection. It occurs when a specific type of white blood cell, called a neutrophil, accumulates in the skin, causing painful, raised, red or purple plaques. While the exact cause remains unknown, it is widely recognized as a hypersensitivity reaction. In our DiseaseMaps.org community, 73 people with Sweet Syndrome have shared their experiences, highlighting the diverse ways this condition presents in patients.

Why is Sweet Syndrome often mistaken for an infection?

People often mistakenly believe Sweet Syndrome is contagious because the skin lesions can look like a bacterial or fungal infection. Furthermore, Sweet Syndrome is frequently accompanied by a high fever and elevated white blood cell counts, which are classic symptoms of an active infection. However, these symptoms are driven by an overactive immune system rather than a pathogen like a virus or bacteria.

Are there known environmental or systemic triggers?

While Sweet Syndrome is not contagious, it is often triggered by underlying systemic factors or environmental exposures. Common triggers include:

• Malignancies: Approximately 20% of cases are associated with an underlying cancer, most commonly acute myeloid leukemia.


• Medications: Certain drugs, such as granulocyte-colony stimulating factor (G-CSF), can trigger the onset of Sweet Syndrome.


• Infections: Recent upper respiratory or gastrointestinal infections can sometimes precede the skin eruption.


• Inflammatory Disorders: Autoimmune diseases like inflammatory bowel disease or rheumatoid arthritis.

Next steps

• Consult a dermatologist or rheumatologist to confirm your diagnosis through a skin biopsy.


• Work with your physician to identify and treat any underlying systemic triggers.


• Join the community at DiseaseMaps.org to connect with others who understand the reality of living with Sweet Syndrome.


• Educate family and friends by sharing that Sweet Syndrome is an inflammatory condition with no risk of contagion.

Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Sweet Syndrome Overview.


• Orphanet: Acute febrile neutrophilic dermatosis (Sweet syndrome).


• National Organization for Rare Disorders (NORD): Sweet Syndrome database.


• PubMed/StatPearls: "Sweet Syndrome" (Clinical review of pathophysiology).