There are many different ways of classifying asthma. Based on the triggers that stimulate an attack, asthma can generally be classified into Extrinsic (allergic) asthma, caused by the reaction of our immune system in response to inhaled allergens such as pollen and dust mites, and Intrinsic (non-allergic) asthma. The factors which can cause this disorder include inhalation of chemicals and cigarette smoke, chest infections, exercise, stress, weather conditions, and cold air. In addition to this, it can also be classified as nocturnal, occupational and seasonal asthma. Treatment is given based on the type of asthma that the patient is suffering from.
A peak flow meter is a portable, hand-held plastic device used to monitor the flow of air from your lungs. It measures your ability to push air out of your lungs. Peak flow meters are available in two ranges. A low range meter is used for small children, whereas the standard range one is used for teenagers and adults. Peak flow meter readings are useful in the management of asthma. These measurements are used to monitor your asthma and prescribe medicines accordingly in order to keep your asthma under control. By comparing the patient with peak flow rates from people not having breathing problems, a standardized normal reading for the patient can be obtained.

When asthma becomes acute, it can lead to a number of serious  complications to asthma patients. It can result in problems like fatigue, absence from work, and psychological problems like stress and anxiety. Asthma patients can also suffer from sleep disturbances due to which people may remain absent at work. Asthma complications in pregnant women can include early labor, hypertension, gestational diabetes and hemorrhage. Asthma in pregnant women also puts their babies at risk of lower birth weight and breathing disorders. Prevention in case of asthma can save you from the expensive curing procedure.