David Beckham health: Star's 'struggle' with 'allergic rhinitis' – expert prevention tips

Usually, perennial allergies cause nasal symptoms but not eye symptoms, similar to what Beckham said he was suffering with. Other common symptoms of perennial allergies include a stuffy nose, repeated sneezing and itchy sinuses.

However, eyes can also display a number of uncomfortable symptoms, becoming red, itchy and watery when affected. For some, a part of the middle ear known as the eustachian tube, which connects the ear and the back of the nose, may become swollen.

As a result, hearing can be impaired, especially in children. Children may also develop chronic ear infections.

When eyes are affected, itching and watering is common. The whites of the eyes can also become red, and the eyelids may become red and swollen. The skin under the eyes can also appear darker.