An allergy is an adverse immune system reaction to a substance that most people find harmless. Allergies can manifest in many ways. Common examples include headaches, fatigue, sneezing, watery eyes, stuffy nose or sinuses and skin rash. Exposure to dust, pollen, dust mites, animal skin flakes, certain chemicals or food and a host of other materials can trigger allergic reactions. What is worse is that an allergy can worsen other disorders....

Eczema is classified based on their causes and where they occur on the body. Eczema can be due to allergies, allergies relating to digestive disorders such as hydrochloric acid deficiency, rashes relating to immune diseases, genetic metabolic disorder or nutritional deficiencies such as lack of vitamin B. Eczema is often an inherited condition that is linked to asthma and rhinitis in the form of a blocked or runny nose. When it flares up, the...