Coughs can range from mild to severe and can be caused by a variety of factors, including infections, allergies, and irritants. A serious cough is one that is accompanied by other symptoms, such as fever, chest pain, or difficulty breathing. It is important to seek medical attention if you have a serious cough, as it could be a sign of a more serious condition.
Signs of a Serious Cough
The most common signs that a cough may be serious include:
• A high fever
• Chest pain
• Difficulty breathing
• Coughing up blood or mucus
• Heavy or rapid breathing
• Wheezing
• A tight feeling in the chest
• Coughing that persists for more than two weeks
Causes of a Serious Cough
A serious cough can be caused by a variety of conditions, including: 
• Pneumonia 
• Asthma 
• COPD 
• Bronchitis 
• Pulmonary embolism 
• Lung cancer 
• Pulmonary fibrosis 
• Pulmonary edema 
• Pulmonary hypertension 
• Pulmonary tuberculosis 
• Heart failure 
• Pulmonary embolism 
• Respiratory infections 
Diagnosis and Treatment of a Serious Cough
If you have a serious cough, it is important to seek medical attention. Your doctor will perform a physical examination and may order tests such as a chest X-ray, CT scan, or pulmonary function test to help diagnose the cause of your cough. Treatment of a serious cough will depend on the underlying cause and may include medications, lifestyle changes, and in some cases, surgery.