Definition: The word "allergia" is derived from the Greek words "alle" (to) and "gina," meaning to make sick or troubled. It is an idiomatic expression referring to a disorder that causes a person's immune system to react inappropriately, leading to symptoms such as allergic reactions, including rashes, itching, swelling, difficulty breathing, fever, and pain. The term can be traced back to the ancient Greek "allergia" which means "to make sick." This word was later influenced by medieval English, where it became a synonym for "allergic," meaning that something is irritating or causes distress. In medical terms, allergies are temporary immune responses to substances that do not normally cause harm. They may be triggered by environmental factors such as pollen, pet dander, dust mites, and other irritants. Some conditions associated with allergic reactions include hay fever, haymumps, and asthma (allergic rhinitis). Allergies can affect the nose, lungs, throat, eyes, skin, and internal organs. They may also cause physical symptoms such as sneezing or coughing and sometimes may lead to chronic respiratory problems. Symptoms of an allergic reaction often include a rash, itching, swelling, difficulty breathing, and pain in specific areas of the body. In summary, allergia is a term from ancient times referring to an immune system response to environmental stimuli that can cause discomfort or irritation. It's important to note that while allergies may initially seem harmless, they are often associated with serious health issues if not treated promptly.

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