Skin and subcutaneous (L00-L99).
- Allergic contact dermatitis (allergic eczema).
- Impetigo (pustule)
- Lichen simplex (synonyms: Neurodermatitis cirumscripta, lichen chronicus vidal or Vidal disease) – localized, chronic inflammatory, plaque and lichinoid (nodular) skin disease that occurs in episodes and is accompanied by severe pruritus (itching).
- Pityriasis amiantacea (synonyms: Tinea amiantacea; asbestos lichen) – extensive, silvery scaling of the scalp; there are smooth transitions to the seborrheic scalp eczema
- Psoriasis (psoriasis)
- Seborrheic eczema (seborrheic dermatitis)
Infectious and parasitic diseases (A00-B99).
- Fleas
- Head lice infestation (pediculosis capitis)
- Dermatomycosis (fungal infection of the skin), unspecified (eg, tinea capitis).
- Scabies (scabies)
- Viral infection, unspecified
- Varicella (chickenpox)
Psyche – nervous system (F00-F99; G00-G99)
- Depression
Further
- Dehydration of the scalp (exsiccation eczema: in addition to a dry skin, one finds scaly, often cracked eczema foci).
- Frequent hair washing, hair dye, hair gel and hair spray.
- Washing and care product intolerance
- Stress
