There are several symptoms of asthma. Wheezing produces a whistling sound usually heard when breathing out. A cough or hack that may not go away and often occurs or worsens at night or with exercise. Chest tightness is described as feeling as if a rope is being pulled tighter and tighter around your chest. Shortness of breath, often described as feeling as though you’re trying to breathe through a straw and can’t catch your breath at all. With asthma, breathing out is especially tough.