Hay fever can be described as an allergy caused by pollen. Pollen is the very fine powdery substance created by plants for the use in pollination, or fertilization. In its most common guise, hay fever is the allergy caused by grass or hay pollens and usually occurs from late spring until early summer.

Usual symptoms of the condition include a runny nose, sneezing, and streaming, itchy eyes. The symptoms are caused due to the body’s immune system reacting to the pollen. Cells which line the nose and eyes tend to release chemicals such as histamines when they come into contact with the pollen, and this causes the inflammation in the eyes and nose which produce the symptoms.

Hay Fever

Hay fever is a very common allergy and affects almost two in every ten people in western society. It usually develops in children of school age and teenage years and the symptoms reappear year after year. Eventually, the symptoms start to decrease over the course of many years, until the condition either disappears totally, or improves vastly. The condition usually runs in families and an individual is more likely to develop asthma or eczema if they already suffer from hay fever.

Although it’s impossible to avoid pollen totally, symptoms are less severe if exposure is reduced. Nowadays pollen counts are freely available for all regions via TV, radio and the internet. Sufferers of the condition are normally treated with antihistamine tablets, antihistamine nose sprays, steroidal nose sprays and eye drops.

A cough is basically a reflex action so the airways can be cleared of phlegm, mucus and other irritants like dust and smoke. An inflammation of the upper respiratory tract due to a virus could also cause a cough.

Coughing can be symptomatic of many conditions including bronchitis, asthma, the common cold, flu, whooping cough or smoking. There are even some prescribed medicines that can cause coughing such as ACE-inhibitors which are used to treat heart failure.

Sometimes a cough can be a symptom of an underlying serious medical condition such as heart failure, lung cancer, tuberculosis, pneumonia or a pulmonary embolism (which is a clot on the lung). Coughs that have been caused by things like flu or the common cold normally disappear after a few days, but coughs that have been caused by an infection of the lung, such as bronchitis, could persist for several weeks, even after the infection has cleared up and this is due to the inflammation of the airways which usually take a while to clear up.

Cough Mechanism and Receptors

If someone has been suffering from a cough for more than a couple of weeks after having a viral infection, they should go to their doctor for medical advice.

The simple description of asthma is that it is a condition that affects the bronchioles in the lungs. Every now and again these tiny airways that are the bronchioles constrict in individuals who have asthma, and it is this that causes the typical symptoms of the condition. How much these tiny airways narrow, and the duration of each “attack” varies a great deal.

Asthma is actually caused by an inflammation in the bronchioles but it hasn’t been recognized up to now why this actually happens. It is this inflammation that affects the muscles that surround the bronchioles and causes them to constrict. This constriction then makes it difficult for air to enter and leave the lungs.

Asthma

Asthma can manifest itself at any age, but usually starts during childhood. In western society, an average of one in ten children and one in twenty adults suffer from asthma. Although the condition does run in families, there are still plenty of people who have it while no other members of their family are affected.

The most common types of symptoms suffered are coughing and wheezing accompanied by breathlessness and a tightening of the chest. These symptoms can also vary from mild to severe in different individuals.
Nearly all asthma sufferers are treated with inhalers and these are small devices that deliver tiny doses of drugs directly into the airways, which relieves irritation in turn helping the airways to expand, making it easier to breathe.