Hay fever affects the upper part of the airways.

Hay fever and allergic asthma are two widespread forms of allergy. Hay fever and asthma are thought to be part of the same disease, as they both affect the lining of the airways, which is continuous from the nose to the lungs.

Hay fever affects the upper part of the airways, inflaming the lining of the nose. This can cause a runny or blocked nose, itching or sneezing, and can be accompanied by watering and itching of the eyes.

Allergic asthma affects the lower part of airways

In contrast, asthma affects the lower part of the airways, causing narrowing of the tubes that lead from the windpipe into the lungs, and can cause difficulty with breathing

Untreated hay fever can cause asthma

Due to the link between allergy and asthma, many people suffer from both conditions and, if you have hay fever, you have a greater risk of developing allergic asthma and new allergies. In order to prevent the development of asthma and new allergies, it is important to treat allergy early.