hello.
seems you may be having an infection of nose or throat or sinusitis.
do you have fever too or pain in the jaws.?
a dark or green colour sputum with blood in it is usually sign of infection.
Next Steps
please Get yourself examined by ENT surgeon.
He will be able to diagnose your illness, even it is common cold.
Answered2018-12-30 02:17:43
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