Cause of a lump on the back of the neck
4 Apr 2019 at 12:00am
Potential causes of a lump on the neck include swollen lymph nodes, acne, and cysts. The type of treatment depends on the cause. Learn more about the various causes of a lump on the neck here.

How to remove henna: 7 easy methods
20 Mar 2019 at 8:00pm
Henna is a popular method of temporary tattooing. It usually fades over several weeks, but there are many methods that can make it disappear faster. Learn more here.

93 percent of medications contain 'potential allergens'
15 Mar 2019 at 3:00pm
Many of the so-called inactive ingredients present in medications could have the potential to cause allergic reactions in some people.

Top 7 essential oils for sinus congestion
27 Feb 2019 at 8:00pm
Essential oils are a popular natural remedy for sinus congestion, stuffiness, and a blocked nose. In this article, we look at which essential oils can help and how to use them.

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Allergies

An allergy or Type I hypersensitivity is an immune malfunction whereby a person's body is hypersensitised to react immunologically to typically nonimmunogenic substances. When a person is hypersensitised, these substances are known as allergens. The word allergy derives from the Greek words allos meaning "other" and ergon meaning "reaction" or "reactivity". Type I hypersensitivity is characterised by excessive activation of mast cells by immunoglobulin E resulting in a systemic inflammatory response that can result in symptoms as benign as a runny nose, to life-threatening anaphylactic shock and death.

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