Differential Diagnosis
DDx Strength: Weak
Upper arm, Multiple skin lesions Add or remove findings

Differential too broad. Edit Findings to refine your results.

Keratosis pilaris

Keratosis pilarisKeratosis pilaris

Arthropod bite or sting

Arthropod bite or stingArthropod bite or sting

Tinea corporis

Tinea corporisTinea corporis

Tinea versicolor

Tinea versicolorTinea versicolor

Phytophotodermatitis

PhytophotodermatitisPhytophotodermatitis

Polymorphous light eruption

Polymorphous light eruptionPolymorphous light eruption

Pityriasis alba

Pityriasis albaPityriasis alba

Viral exanthem

Viral exanthemViral exanthem

Actinic keratosis

Actinic keratosisActinic keratosis

Allergic contact dermatitis

Allergic contact dermatitisAllergic contact dermatitis

Atopic dermatitis

Atopic dermatitisAtopic dermatitis

Bullous impetigo

Bullous impetigoBullous impetigo

CA-MRSA skin infection

CA-MRSA skin infectionCA-MRSA skin infection

Café au lait spot

Café au lait spotCafé au lait spot

Common wart

Common wartCommon wart

Dermographism

DermographismDermographism

Factitial ulcer

Factitial ulcerFactitial ulcer

Flat wart

Flat wartFlat wart

Folliculitis

FolliculitisFolliculitis

Furunculosis

FurunculosisFurunculosis

Futcher lines

Futcher linesFutcher lines

Guttate psoriasis

Guttate psoriasisGuttate psoriasis

Herpes zoster

Herpes zosterHerpes zoster

Idiopathic guttate hypomelanosis

Idiopathic guttate hypomelanosisIdiopathic guttate hypomelanosis

Molluscum contagiosum

Molluscum contagiosumMolluscum contagiosum

Neurotic excoriations

Neurotic excoriationsNeurotic excoriations

Non-bullous impetigo

Non-bullous impetigoNon-bullous impetigo

Nummular dermatitis

Nummular dermatitisNummular dermatitis

Poison ivy - oak - sumac dermatitis

Poison ivy - oak - sumac dermatitisPoison ivy - oak - sumac dermatitis

Postinflammatory hyperpigmentation

Postinflammatory hyperpigmentationPostinflammatory hyperpigmentation

Prurigo nodularis

Prurigo nodularisPrurigo nodularis

Psoriasis

PsoriasisPsoriasis

Scar

ScarScar

Seborrheic keratosis

Seborrheic keratosisSeborrheic keratosis

Sunburn

SunburnSunburn

Traumatic purpura

Traumatic purpuraTraumatic purpura

Urticaria

UrticariaUrticaria

Vitiligo

VitiligoVitiligo

Miliaria rubra

Miliaria rubraMiliaria rubra

Subacute cutaneous lupus erythematosus

Subacute cutaneous lupus erythematosusSubacute cutaneous lupus erythematosus

Acne excoriée

Acne excoriéeAcne excoriée

Angiokeratoma

Angiokeratoma

Bedbug bite

Bedbug biteBedbug bite

Drug-induced phototoxic reaction

Drug-induced phototoxic reactionDrug-induced phototoxic reaction

Erysipelas

ErysipelasErysipelas

Fixed drug eruption

Fixed drug eruptionFixed drug eruption

Keratinocytic epidermal nevus

Keratinocytic epidermal nevusKeratinocytic epidermal nevus

Lyme disease

Lyme diseaseLyme disease

Metastatic melanoma

Metastatic melanomaMetastatic melanoma

Physical urticaria

Physical urticaria

Pruritus without rash

Pruritus without rashPruritus without rash

Skin abscess

Skin abscessSkin abscess

Skin popping substance abuse

Skin popping substance abuseSkin popping substance abuse

Trichostasis spinulosa

Trichostasis spinulosa

Urticarial vasculitis

Urticarial vasculitisUrticarial vasculitis

Elastosis perforans serpiginosa

Elastosis perforans serpiginosaElastosis perforans serpiginosa

Macular amyloidosis

Macular amyloidosisMacular amyloidosis

Smooth muscle hamartoma

Smooth muscle hamartomaSmooth muscle hamartoma

Steatocystoma multiplex

Steatocystoma multiplexSteatocystoma multiplex

Actinic granuloma

Actinic granulomaActinic granuloma