DDx ⬇
- Tinea
- Warts
- Dyshidrotic eczema (pomphylox, dyshidrosis)
- Secondary syphilis
- Dermatophytid reaction (allergy or sensitivity to fungi)
- Erythema multiforme
- Rocky Mountain spotted fever
- Drug eruption
- Janeway lesions or Osler's nodes (bacterial endocarditis)
- Cholesterol emboli
- Contact dermatitis (palms)
- Pitted keratolysis (soles)
- Keratoderma blennorrhagica (with reactive arthritis or Reiter's syndrome)
- Psoriasis
- Gonococcemia or meningococcemia
- Hand, foot, and mouth disease
- Toxic shock syndrome
- Lichen planus (ulcerative)
- Melanoma
- Calluses or corns
- Rat-bite fever
- Arsenic poisoning
Related DDx ⬆