Insect sting can cause allergic response which results in pain, itching, redness and swelling. Furthermore, people allergic to stinging venom can cause more serious reaction i.e. anaphylaxis (Bernstein et al., 2011; Department of Health, 2016).
Occupational allergy is an allergic reaction caused when exposed to allergenic substance found at work place. This can be both indoor or outdoor. It is an important public health issue due to its high prevalence and socio-economic burden.
Urticaria is a heterogeneous skin disorder, which is characterized by development of wheals on the skin followed by Angioedema.
Food allergy is an allergic reaction which is instigated with consumption of food which contains certain proteins, which can overreact with the immune system.
Asthma is an anti-inflammatory chronic disease which affects the lungs. It mainly affects the airway linings which swells and the muscles encircling the airway tightening causes the airway narrow.
When the ocular surface is exposed to allergen, it results in the inflammation of conjunctiva (inside of eyelid covering the eyeball) and cornea leading to allergic conjunctivitis also known as pink eyes. The prevalence of the allergic conjunctivitis is found more in summer and spring (Høvding, 2008).
Allergic rhinitis is a group of symptoms leading to nasal congestion, itching and inflammation. The symptoms occur when the subject is allergic to dust, mite, pollen (Seidman et al., 2015).