| MACULAR OR MACULOPAPULAR RASH | |
| Viruses | Adenovirus |
| Measles | |
| Rubella | |
| Roseola (HHV-6 or HHV-7) | |
| Erythema infectiosum (fifth disease, parvovirus B19) | |
| Epstein-Barr virus | |
| Echoviruses | |
| HBV (papular acrodermatitis or Gianotti-Crosti syndrome) | |
| HIV | |
| Bacteria | Erythema marginatum (rheumatic fever) |
| Scarlet fever (group A streptococcus) | |
| Erysipelas (group A streptococcus) | |
| Arcanobacterium haemolyticum | |
| Secondary syphilis | |
| Leptospirosis | |
| Pseudomonas | |
| Meningococcal infection (early) | |
| Salmonella typhi (typhoid fever) | |
| Lyme disease (erythema migrans) | |
| Mycoplasma pneumoniae | |
| Rickettsiae | Rocky Mountain spotted fever (early) |
| Typhus (scrub, endemic) | |
| Ehrlichiosis | |
| Other | Kawasaki disease |
| Rheumatoid arthritis | |
| Drug reaction | |
| DIFFUSE ERYTHRODERMA | |
| Bacteria | Scarlet fever (group A streptococcus) |
| Staphylococcal scalded skin syndrome | |
| Toxic shock syndrome (Staphylococcus aureus) | |
| Fungi | Candida albicans |
| Other | Kawasaki syndrome |
| URTICARIAL RASH | |
| Viruses | Epstein-Barr virus |
| HBV | |
| HIV | |
| Bacteria | M. pneumoniae |
| Group A streptococcus | |
| Other | Drug reaction |
| VESICULAR, BULLOUS, PUSTULAR | |
| Viruses | Herpes simplex viruses |
| Varicella-zoster virus | |
| Coxsackievirus | |
| Bacteria | Staphylococcal scalded skin syndrome |
| Staphylococcal bullous impetigo | |
| Group A streptococcal crusted impetigo | |
| Rickettsiae | Rickettsialpox |
| Other | Toxic epidermal necrolysis |
| Erythema multiforme (Stevens-Johnson syndrome) | |
| PETECHIAL-PURPURIC | |
| Viruses | Adenovirus |
| Atypical measles | |
| Congenital rubella | |
| Congenital cytomegalovirus | |
| Enterovirus | |
| Papular-purpuric gloves and socks (parvovirus B19) | |
| HIV | |
| Hemorrhagic fever viruses | |
| Bacteria | Sepsis (meningococcal, gonococcal, pneumococcal, Haemophilus influenzae type b) |
| Infective endocarditis | |
| Ecthyma gangrenosum (Pseudomonas aeruginosa) | |
| Rickettsiae | Rocky Mountain spotted fever |
| Epidemic typhus | |
| Ehrlichiosis | |
| Fungi | Necrotic eschar (Aspergillus, Mucor) |
| Other | Vasculitis |
| Thrombocytopenia | |
| Henoch-Schönlein purpura | |
| Malaria | |
| ERYTHEMA NODOSUM | |
| Viruses | Epstein-Barr virus |
| HBV | |
| Bacteria | Group A streptococcus |
| Mycobacterium tuberculosis | |
| Yersinia | |
| Cat-scratch disease (Bartonella henselae) | |
| Fungi | Coccidioidomycosis |
| Histoplasmosis | |
| Other | Sarcoidosis |
| Inflammatory bowel disease | |
| Estrogen-containing oral contraceptives | |
| Systemic lupus erythematosus | |
| Behçet disease | |
References:
Nelson Essential Pediatrics 6th Edition