Health

How to combat the effects of aging on your skin

While it's often hard to appreciate our aging skin, it does tell a story. It speaks of our family heritage: Genetic code mostly drives the development of lines. It can also say something about our lives, like how we enjoyed ...

Diseases, Conditions, Syndromes

After lull, cases spread in Vietnam's cities, provinces

After over a month with no local infections, Vietnam has recorded 176 confirmed coronavirus cases from several outbreaks that have spread to 19 provinces during the past 10 days, the Health Ministry said.

Vaccination

Had facial fillers? What you need to know about COVID vaccines

Once you've landed that coveted coronavirus vaccine appointment, you'll likely have to fill out a form on your medical history and whether you're allergic to any of the vaccine's ingredients. But there could be another question ...

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Allergy

Allergy is a disorder of the immune system often also referred to as atopy. Allergic reactions occur to normally harmless environmental substances known as allergens; these reactions are acquired, predictable, and rapid. Strictly, allergy is one of four forms of hypersensitivity and is called type I (or immediate) hypersensitivity. It is characterized by excessive activation of certain white blood cells called mast cells and basophils by a type of antibody known as IgE, resulting in an extreme inflammatory response. Common allergic reactions include eczema, hives, hay fever, asthma, food allergies, and reactions to the venom of stinging insects such as wasps and bees.

Mild allergies like hay fever are highly prevalent in the human population and cause symptoms such as allergic conjunctivitis, itchiness, and runny nose. Allergies can play a major role in conditions such as asthma. In some people, severe allergies to environmental or dietary allergens or to medication may result in life-threatening anaphylactic reactions and potentially death.

A variety of tests now exist to diagnose allergic conditions; these include testing the skin for responses to known allergens or analyzing the blood for the presence and levels of allergen-specific IgE. Treatments for allergies include allergen avoidance, use of anti-histamines, steroids or other oral medications, immunotherapy to desensitize the response to allergen, and targeted therapy.

This text uses material from Wikipedia, licensed under CC BY-SA