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Asthma signs and symptoms range from minor to severe, and vary from person to person. You may have mild symptoms such as infrequent wheezing, with occasional asthma attacks. Between episodes you may feel normal and have no trouble breathing. Or, you may have signs and symptoms such as coughing and wheezing all the time or have symptoms primarily at night or only during exercise. An increase in the severity and frequency of asthma signs and symptoms. A fall in peak flow rates as measured by a peak flow meter, a simple device used to check how well your lungs are working. An increased need to use bronchodilators - medications that open up airways by relaxing the surrounding muscles.