Hay fever (also referred to as seasonal allergic rhinitis), is an allergic reaction to pollen, an airborne allergen which is released from grass, trees, weeds and flowers. The allergic reaction is triggered when pollen comes into contact with your mouth, nose eyes and throat. Hay fever is usually worse between late March and September when the pollen count is at its highest as different plants release their pollen into the atmosphere. Typically the pollen season in the UK separates into three main sections:

1. Tree pollen - late March to mid-May.
2. Grass pollen - mid-May to July.
3. Weed pollen - end of June to September

You can use our pollen calendar  for more details of the different pollen seasons