Anemia, heart problems, anxiety, pulmonary issues and stomach problems can cause shortness of breath and excessive yawning, according to eHow. Another possibility is asthma, according to Everyday Health.
Anemia is a condition in which there is a lack of red blood cells or hemoglobin. Hemoglobin is a component of red blood cells that binds oxygen; thus anemia causes a lack of oxygen in the body, reports WebMD. The most common type is iron-deficiency anemia, which usually responds to treatment involving dietary changes and iron supplements.
If the heart cannot pump enough blood to supply oxygen to the body, it can cause shortness of breath. However, it's possible to confuse panic attacks or anxiety with heart trouble, explains eHow.
Conditions that obstruct the airway, such as swollen sinuses and enlarged tonsils, can also cause shortness of breath. Other causes include asthma, diseased lungs and pneumonia, reports eHow.
Hiatal hernias can cause shortness of breath when the hernia swells and moves the heart, resulting in physical symptoms that can seem similar to heart problems. Acid reflux can also cause temporary shortness of breath, explains eHow.
In some cases, frequent deep breaths and yawning are an early sign of asthma, according to Everyday Health. Other symptoms of asthma include a dry, hacking cough, difficulty sleeping, rapid breathing, retractions, workout fatigue and indigestion.