Alphavirus infection
Asymmetric periflexural exanthem of childhood (unilateral laterothoracic exanthem)
B virus infection
Boston exanthem disease
Bovine papular stomatitis
Bowenoid papulosis
Buffalopox
Butchers wart
Chikungunya fever
Condylomata acuminata
Congenital rubella syndrome
Cowpox
Cytomegalic inclusion disease
Dengue (Break-bone fever)
Disseminated herpes zoster
Eczema herpeticum (Kaposis varicelliform eruption) 
Eczema vaccinatum
Epidermodysplasia verruciformis
Eruptive pseudoangiomatosis
Erythema infectiosum (fifth disease, slapped cheek disease)
Exanthem of primary HIV infection (acute retroviral syndrome)
Farmyard pox
Generalized vaccinia
Genital herpes (herpes genitalis, herpes progenitalis)
Gianotti–Crosti syndrome (infantile papular acrodermatitis, papular acrodermatitis of childhood, papulovesicular acrolocated syndrome)
Giant condyloma acuminatum (Buschke–Löwenstein tumor, giant condyloma of Buschke–Löwenstein tumor)
Hand-foot-and-mouth disease
Hecks disease (focal epithelial hyperplasia)
Hemorrhagic fever with renal syndrome
Hepatitis B
Hepatitis C
Herpangina
Herpes gladiatorum (scrum pox)
Herpes simplex
Herpes zoster oticus (Ramsay–Hunt syndrome)
Herpetic keratoconjunctivitis
Herpetic sycosis
Herpetic whitlow
HIV-associated pruritus
Human monkeypox
Human T-lymphotropic virus 1 infection
Human tanapox
Immune reconstitution inflammatory syndrome (immune recovery syndrome)
Infectious mononucleosis (glandular fever)
Inflammatory skin lesions following zoster infection (isotopic response)
Intrauterine herpes simplex 
Kaposi sarcoma
Lassa fever
Lipschütz ulcer (ulcus vulvae acutum)
Measles (rubeola, morbilli)
Milkers nodule
Modified varicella-like syndrome
Molluscum contagiosum
Myrmecia
Neonatal herpes simplex
Ophthalmic zoster
Orf (contagious pustular dermatosis, ecthyma contagiosum, infectious labial dermatitis, sheep pox)
Orf-induced immunobullous disease
Orolabial herpes (herpes labialis)
Papular purpuric gloves and socks syndrome
Pigmented wart
Postherpetic neuralgia (zoster-associated pain)
Post-vaccination follicular eruption
Progressive vaccinia (vaccinia gangrenosum, vaccinia necrosum)
Pseudocowpox
Recurrent respiratory papillomatosis (laryngeal papillomatosis) 
Rift Valley fever
Roseola infantum (exanthem subitum, exanthema subitum, sixth disease)
Roseola vaccinia
Rubella (German measles)
Sandfly fever (Pappataci fever, phlebotomus fever)
Sealpox
Varicella (chickenpox)
Variola major (smallpox)
Verruca plana (flat wart)
Verruca plantaris (plantar wart)
Verruca vulgaris (wart)
Verrucae palmares et plantares
Viral-associated trichodysplasia (ciclosporin-induced folliculodystrophy)
Wasting syndrome
West Nile virus infection
Zoster (herpes zoster, shingles)
Zoster sine herpete

Lichenoid eruptions
Lichenoid eruptions are dermatoses related to the unique, common inflammatory disorder lichen planus, which affects the skin, mucous membranes, nails, and hair.
Acatalasia (acatalasemia, Takaharas disease)
Acquired dyskeratotic leukoplakia
Actinic cheilitis (actinic cheilosis)
Acute necrotizing ulcerative gingivitis (acute membranous gingivitis, acute necrotizing ulcerative gingivostomatitis, fusospirillary gingivitis, fusospirillosis, fusospirochetal gingivitis, necrotizing gingivitis, phagedenic gingivitis, trench mouth, ulcerative gingivitis, Vincent gingivitis, Vincent infection, Vincent stomatitis, Vincents disease)
Allergic contact cheilitis
Angina bullosa haemorrhagica
Angular cheilitis (perlèche)
Behçets disease (Behçets syndrome, oculo-oral-genital syndrome)
Black hairy tongue (hairy tongue, lingua villosa nigra) 
Caviar tongue
Cheilitis exfoliativa
Cheilitis glandularis
Cheilitis granulomatosa (granulomatous cheilitis, orofacial granulomatosis)
Cutaneous sinus of dental origin (dental sinus)
Cyclic neutropenia
Desquamative gingivitis
Drug-induced ulcer of the lip
Epidermization of the lip
Epulis
Epulis fissuratum (granuloma fissuratum)
Eruptive lingual papillitis
Erythroplakia (erythroplasia)
Fissured tongue (furrowed tongue, lingua plicata, plicated tongue, scrotal tongue)
Geographic tongue (benign migratory glossitis, benign migratory stomatitis, glossitis areata exfoliativa, glossitis areata migrans, lingua geographica, stomatitis areata migrans, transitory benign plaques of the tongue)
Gingival fibroma
Gingival hypertrophy
Hairy leukoplakia (oral hairy leukoplakia)
Intraoral dental sinus
Linea alba
Leukoplakia
Leukoplakia with tylosis and esophageal carcinoma
Major aphthous ulcer (periadenitis mucosa necrotica recurrens)
Median rhomboid glossitis (central papillary atrophy)
Melanocytic oral lesion
Melkersson–Rosenthal syndrome
Morsicatio buccarum (chronic cheek biting, chronic cheek chewing)
Mucosal squamous cell carcinoma
Mucous cyst of the oral mucosa (mucocele)
Nagayamas spots
Oral Crohns disease
Oral florid papillomatosis
Oral melanosis
Osseous choristoma of the tongue
Peripheral ameloblastoma
Plasma cell cheilitis (plasma cell gingivitis, plasma cell orificial mucositi)
Plasmoacanthoma
Proliferative verrucous leukoplakia
Pyogenic granuloma (eruptive hemangioma, granulation tissue-type hemangioma, granuloma gravidarum, lobular capillary hemangioma, pregnancy tumor, tumor of pregnancy)  
Pyostomatitis vegetans
Recurrent aphthous stomatitis (aphthosis, canker sores, recurrent oral aphthae)
Recurrent intraoral herpes simplex infection
Smooth tongue (atrophic glossitis, bald tongue, hunter glossitis, moeller)
Stomatitis nicotina (nicotine stomatitis, smokers keratosis, smokers patches)
Torus palatinus
Trumpeters wart
Vestibular papillomatosis
White sponge nevus (white sponge nevus of Cannon)

Conditions of the skin appendages
Conditions of the skin appendages are those affecting the glands of the skin, hair, nails, and arrector pili muscles.