Hay fever is a common ailment characterized by recurrent sneezing, runny nose, nasal congestion and watery eyes and affects millions of people globally. There is often a misconception, largely due to the term ‘hay fever’, that it is caused and solely due to pollen and other botanical irritants. However, hay fever is one presentation of a constitutional immune-mediated hypersensitivity known as atopy, that is also responsible for other allergic conditions like allergic asthma and atopic dermatitis. Hay fever is more correctly known as allergic rhinitis. It can be either seasonal or perennial and must be differentiated from non-allergic rhinitis.