It could be sequelae to Previous TB infection. Happens In many patients who had TB earlier. Or it could be reactivation too.
Need to know the duration of symptoms. Is there any fever currently. Is he on any blood thinners? Because mild streaky sputum can happen in infection also while coughing if blood thinners are ongoing.
Next Steps
kindly do a chest xray , sputum analysis(AFB, Gene expert) , CBC and connect.
Health Tips
Do not ignore these symptoms for too long if remains unresolved. Blood in sputum should be evaluated properly.