Persistent Cough
⚠️ Hemoptysis (coughing blood) requires immediate medical evaluation.
A cough lasting >8 weeks can indicate lung cancer, autoimmune lung disease, or post-infectious inflammation. Hemoptysis (coughing blood) is a red flag requiring immediate evaluation.
Body System: Respiratory
Related Diseases
- Stage IV Cancer (Lung) — Persistent cough is the most common presenting symptom of lung cancer, especially in smokers.
- Autoimmune Lung Disease — Interstitial lung disease in RA, scleroderma, and dermatomyositis causes chronic cough.
Related Compounds
Frequently Asked Questions
When should I worry about a persistent cough?
Seek evaluation if cough lasts >8 weeks, produces blood, is accompanied by unexplained weight loss, night sweats, or shortness of breath. Smokers/former smokers with new cough should have chest CT. Low-dose CT screening is recommended for high-risk individuals (55-80yo, 30+ pack-year history).