Erythema Nodosum Causes & Risks

Causes

Erythema nodosum is thought to be a type of allergic reaction. It may be caused by:

Infections
- Streptococcal infections ( strep throat , tonsillitis, rheumatic fever )
- Various viral infections (eg, infectious mononucleosis and hepatitis B )
- Tuberculosis
- Fungal lung infections (coccidioidomycosis, histoplasmosis )
- Psittacosis (parrot fever)
- Lymphogranuloma venereum (an uncommon sexually transmitted disease)
- Leprosy (Hansen’s disease)
Inflammatory conditions
Medications
- Sulfa drugs
- Iodides
- Bromides
- Birth control pills
Unknown causes

Risk Factors

This condition is rare. Having any of the causes listed above will only slightly increase your risk of the disorder. It is more common in:

Young adults (20-30 years old)
Females

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition. Copyright © 2024 EBSCO Publishing All rights reserved.