Differential diagnosis of herpes simplex are :
-trauma
-scabies
-herpes zoster / shingles
-varicella/ chicken pox
-impetigo
-aphthous ulcers
-systemic lupus erythematosus
-squamous cell carcinoma
-bullous pemphigoid
-Behcet’s syndrome
-reactive arthritis
-candidiasis
-primary HIV infection
-pemphigus
-erythema multiforme
-herpangina / coxsackie virus
-syphilis
-lymphogranuloma venereum
-chancroid
-trauma
-scabies
-herpes zoster / shingles
-varicella/ chicken pox
-impetigo
-aphthous ulcers
-systemic lupus erythematosus
-squamous cell carcinoma
-bullous pemphigoid
-Behcet’s syndrome
-reactive arthritis
-candidiasis
-primary HIV infection
-pemphigus
-erythema multiforme
-herpangina / coxsackie virus
-syphilis
-lymphogranuloma venereum
-chancroid