There are many reasons why dogs are prone to eczema, including the following:
Food allergies: Dogs may be allergic to certain foods, leading to allergic skin reactions and eczema.
Environmental factors: Dogs exposed to damp, wet or excessively cold or excessively dry environments can also easily cause eczema.
Fleas or other parasites: Fleas and other parasites can cause itching on the dog's skin, which can lead to eczema.
Genetic factors: Some dogs may be born prone to eczema, which may be related to their genetic genes.
Other factors: The dog’s age, health, eating habits and lifestyle may affect the dog’s susceptibility to eczema.