Hi, I am Dr. Atul Kumar Nimawat MS ENT.
based on your symptoms — cold, cough for the past 3 days, occasional fever, and blood-streaked phlegm (hemoptysis) seen only in the first morning expectoration — the most likely cause appears to be irritation of the throat or bronchial mucosa due to persistent coughing or infection.
This can occur when frequent coughing causes minor trauma to the small blood vessels in the throat or airways, especially if the phlegm is thick or if the cough is forceful. The fact that blood is present only in the first phlegm and not throughout the day is somewhat reassuring and suggests a localized irritation rather than a serious underlying disease.
Next Steps
Since you have already started medication and the bleeding is minimal and not ongoing, you can continue supportive care for another 1–2 days. However, if symptoms do not improve or the blood in sputum continues, it is advised to consult an ENT specialist or a chest physician (pulmonologist) for a proper physical examination and possibly a chest X-ray to rule out infections like bronchitis, pneumonia, or rarely tuberculosis (if risk factors are present).