Hi there.. You may have a throat infection that has not properly healed or you may have a lesion in your throat, such as a polyp, that was made worse by your flu or even brought on by your flu, that began to bleed with your coughing. I doubt that the bleeding was from your larynx unless your scratchy throat occurs primarily when you talk, which would point to some type of laryngeal lesion. You probably should go and see an ENT [ear, nose & throat] MD and let him check you out. Take care
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