I've been noticing some blood-colored mucus once in a while over the past few weeks, and for the past two months, it's been feeling like my breathing is sometimes obstructed. I just got a body check and everything came back normal, including the blood test, but they didnt explain why I'm seeing the blood-colored mucus. Is this something I should be worried about, like could it be a sign of lung cancer?

X-ray chest pa view,complete blood count,esr,C-reactive protein ,IGE levels and sputum for AFB and microscopy is advised to the patient.