Many conditions may cause dyspnea and coughing. In cancer patients, causes may include the following:
Direct effects of the tumor
Indirect effects of the tumor
Conditions the patient may have unrelated to the cancer
- Chronic obstructive airway disease
- Congestive heart failure
- A condition in which the blood is too acidic
- Weakened muscles in the airways that cause spasms.
Conditions with no known physical cause, such as anxiety.