Seasonal allergic rhinitis (SAR) is a global health problem and affects 20% of the UK population. It is the main form of rhinitis in children whereas in adults it accounts for about a third of cases. SAR can have  a significant impact on patients' quality of life. It can lead to non-attendance and underperformance at school and work and results in substantial NHS costs. In children, it may affect GCSE results as the grass pollen season coincides with exams. SAR is a risk factor for the development of asthma and chronic rhinosinusitis which may be difficult to treat. As the major burden of allergic rhinitis is on primary care, GPs play a key role in the management of these patients.