Many people suffer from ‘inhalant’ allergies caused by environmental factors such as pets, house dust mites, moulds and pollen. Symptoms include sneezing, dry throat, a runny or blocked nose, itchy eyes, and even headaches caused by inflammation of the nose or eye linings. Additional symptoms can include inability to concentrate, disturbed sleep, lethargy and depression. If left untreated, hay fever can develop into asthma.
