Asthma symptoms vary from person to person. You may have infrequent asthma attacks, have symptoms only at certain times — such as when exercising — or have symptoms all the time. Asthma signs and symptoms include: 
Shortness of breath
Chest tightness or pain
Wheezing when exhaling, which is a common sign of asthma in children
Trouble sleeping caused by shortness of breath, coughing or wheezing
Coughing or wheezing attacks that are worsened by a respiratory virus, such as a cold or the flu
 Signs that your asthma is probably worsening include: 
Asthma signs and symptoms that are more frequent and bothersome
Increasing difficulty breathing, as measured with a device used to check how well your lungs are working (peak flow meter)
The need to use a quick-relief inhaler more often
 For some people, asthma signs and symptoms flare up in certain situations: 
Exercise-induced asthma, which may be worse when the air is cold and dry
Occupational asthma, triggered by workplace irritants such as chemical fumes, gases or dust
Allergy-induced asthma, triggered by airborne substances, such as pollen, mold spores, cockroach waste, or particles of skin and dried saliva shed by pets (pet dander)
