Allergic rhinitis is inflammation of the inside of the nose caused by allergens like pollen, dust, mould or animal dander. Symptoms are usually sneezing, itching, blocked or runny nose and itchy eyes. Allergic rhinitis caused by pollen is also known as hay fever. In the UK, there are usually peaks of tree pollen from March to May, grass pollen from May to July and weed pollen from June to September. Hay fever symptoms can last for months and interfere with everyday life. Our GP or allergist can arrange allergy testing and advise on treatment.