Hello
There are many underlying disorders that can cause hemoptysis (coughing up blood), ranging from heart problems to trauma to infections to lung disease. Worldwide,
tuberculosis is the most common cause of hemoptysis. In industrialized countries, the most common causes are bronchitis,
bronchiectasis, and
bronchogenic carcinoma.
In patients with AIDS, the most common cause of hemoptysis is pneumonia. In about 15% to 30% of cases, the underlying problem is never found—undiagnosed hemoptysis is commonly referred to as idiopathic hemoptysis.
Haemoptysis may also be due to any of the followings
Endobrochial lesions
Arterio venous malformation
High blood pressure Bleeding disorders
For that check ur BP
Consult a Pulmonologist and do following investigations
BT, CT, APTT, PT
CT Angiography to rule out any AV malfomations
Fiberoptic Bronchoscopy to rule out any endobronchial lesions
At last hemoptysis can be idiopathic without any cause.
Discuss this with your doctor and then decide
Hope this helps
Take Care.