DDx ⬇
- Aphthous ulcer (canker sore, ulcerative stomatitis)
- Herpes simplex
- Erythema multiforme
- Drug reaction
- Pemphigus
- Bullous pemphigoid
- Systemic lupus erythematosus (SLE)
- Lichen planus
- Coxsackievirus (herpangina, hand-foot-mouth disease)
- Acute HIV infection
- Parvovirus
- Varicella zoster
- Syphilis
- Oral candidiasis
- Behçet’s syndrome
- Reactive arthritis
- Inflammatory bowel disease
- Squamous cell carcinoma
- Necrotizing ulcerative gingivostomatitis (Vincent’s fusospirochetal disease)
Related DDx ⬆