Thank you for your query at AskTheDoctor.com
I understand your concern.
You seem to be having a lower respiratory tract infection causing the excretion of black strands in sputum.
You need to consult your Physician, who can auscultate you and confirm the diagnosis and start an appropriate antibiotic. A good choice antibiotic would be Tab. Cefixime 200 mg twice daily for 5-7 days depending on the severity. Syrup. Ascoril can be taken 2 teaspoons twice daily for 3 days or till the cough subsides.
Additionally, if you develop runny nose or nasal congestion, Tab. Levocetirizine can be taken once at bedtime for 3 days.
Hope this was helpful,
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