Eczema is believed to be caused due to genetic tendencies which run in the families and is triggered or increased by various environmental factors such as the use of chemicals, allergic substances, low or high temperature, certain types of food allergens, emotional stress and/or hormonal imbalance.
This allergy can also be explained as oversensitivity to either external or internal factors or both. Nutritional deficiency is another factor which aggravates eczema.
The exact cause of eczema is unknown. Basically, the cause of eczema can be classified as genetic or inherited and environmental. The tendency to get affected by eczema usually runs in families. Although a person may have a tendency to develop eczema since birth, eczema is developed only when favorable environmental factors trigger it. This shows that environmental factors are equally important in developing as well as aggravating eczema.