Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment.
These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis.
Symptoms may include red eyes, an itchy rash, sneezing, a runny nose, shortness of breath, or swelling.
Atopic dermatitis is a long-term (chronic) skin disorder that involves scaly and itchy rashes. Atopic dermatitis is due to a …
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