Allergies are very common in Hong Kong, people suffering with runny nose and sneezing could be found everywhere when weather changes or air pollution is severe. Some other common allergic reactions include eczema (dry, red, itchy skin), allergic rhinitis, asthma, food allergy etc.

Allergy occurs when a person’s immune system reacts to substances in the environment that are harmless for most people, resulting in allergic reaction like sneezing or itchiness. Human body identifies harmful external agents such as bacteria or viruses and give out signals, causing discomfort from allergic reaction. Allergy tests identify specific allergens that are potential threats to our health, it acts as a warning to stay away from those allergens to combat allergies.