| Chronic dermatoses |
| Seborrheic dermatitis |
| Contact dermatitis |
| Nummular eczema |
| Psoriasis |
| Ichthyoses |
| Infections and infestations |
| Scabies |
| Human immunodeficiency virus-associated dermatitis |
| Dermatophytosis |
| Immunodeficiencies |
| Wiskott-Aldrich syndrome |
| Severe combined immunodeficiency syndrome |
| Hyper-IgE syndrome |
| Autoimmune disorders |
| Dermatitis herpetiformis |
| Pemphigus foliaceus |
| Graft-versus-host disease |
| Dermatomyositis |
| Metabolic disorders |
| Zinc deficiency |
| Pyridoxine ( vitamin B6) and niacin |
| Multiple carboxylase deficiency |
| Phenylketonuria |
| Congenital disorders |
| Netherton’s syndrome |
| Familial keratosis pilaris |
| Malignancies |
| Cutaneous T cell lymphoma ( mycosis fungoides/Sérazy syndrome) |
| Letterer-Siwe disease |
