See also fever and petechiae
Differential Diagnosis
| Etiology | Appearance | Clinical clues |
|---|---|---|
| Viruses | ||
| EBV/CMV | Mono-like illness | |
| HIV | HIV risk factors | |
| VZV | ||
| Parvovirus B19 | ||
| Measles | ||
| Mumps | ||
| Rubella | ||
| Dengue | travel, "breakbone fever" | |
| Zika | travel | |
| Chikungunya | travel, arthritis | |
| Bacteria | ||
| Mycoplasma pneumoniae | ||
| Group A Streptococcus | ||
| Syphilis | ||
| Gonorrhea | ||
| Rocky Mountain spotted fever | ||
| Meningococcus | meningitis | |
| Toxic shock syndromes | ||
| Infective endocarditis | ||
| Fungi | ||
| Coccidioides | ||
| Drugs | ||
| Delayed hypersensitivity or DRESS | ||
| SJS/TEN | ||
| Acute generalized exanthematous pustulosis | ||
| Serum sickness | ||
| Malignancy | ||
| Lymphoma | ||
| Leukemia | ||
| Autoimmune/Inflammatory | ||
| Vasculitis | ||
| Systemic lupus erythematosus | ||
| Still disease | ||
| Sweet syndrome | ||
| Anticholinergic toxicity | ||
