The 2020 International Alliance for the Control listed conditions that may be misdiagnosed as scabies.
Conditions in the differentia diagnosis of scabies:
(1) arthropod bites
(2) atopic dermatitis
(3) avian mites
(4) contact dermatitis
(5) cutaneous larva migrans
(6) Darier disease
(7) delusion of parasitosis
(8) dermatitis herpetiformis
(9) eczema (exfoliative, numular, dyshydrotic)
(10) fiberglass dermatitis
(11) folliculitis
(12) impetigo
(13) incontinentia pigmenti
(14) Langerhans cell histiocytosis
(15) lice
(16) lichen planus
(17) molluscum contagiosum
(18) mycosis fungoides or Sezary syndrome
(19) onchocerciasis
(20) palmoplantar keratoderma
(21) papular uritcaria
(22) pemphigus vulgaris
(23) pityriasis rosea or pityriasis rubra pilaris
(24) prurigo nodularis
(25) psoriasis
(26) seborrheic keratosis
(27) syphilis
(28) tinea
(29) transient acantholytic dermatosis
(30) urticaria pigmentosa
(31) Varicella zoster
(32) verruca
(33) viral exanthem
A patient can have both scabies and one or more of these conditions.
