<unk>  may have physiological or pathological causes. Both of these categories would include large lists of individual causes. Physiological causes Physiological causes of<unk>  include exercise. This type is usually not a cause of concern unless it's excessive. Pathological causes Pathological causes of<unk>  include sepsis, compensation for diabetic ketoacidosis or other metabolic acidosis, pneumonia, pleural effusion, carbon monoxide poisoning, pulmonary embolism, asthma, COPD, laryngospasm, allergic reaction causing airway edema, foreign body aspiration, tracheobronchomalacia, congestive heart failure, anxiety states, haemorrhage, or many other medical issues.
Tachypnea
Platypnea
Apnea
Hyperpnea
Bradypnea
Periodic breathing
Orthopnea
Shallow breathing