Asthma is a common respiratory disease, with typical symptoms including episodic coughing, chest tightness, wheezing, and difficulty breathing, among others. The exact causes of asthma are not entirely clear at present, but it is generally believed to be related to genetic factors and environmental factors. Genetically, the closer the familial relation to an asthma patient, the greater the likelihood of developing the disease. Environmentally, elements such as allergens, pollen, dust mites, infections from certain bacteria or viruses, certain seafood, and medications, among others, can all trigger asthma attacks.