When i blow my nose, the mucous is mixed with blood. does this mean that my sinuses are inflamed and the source of the blood? nose not the source.

Bloody mucus: You can't tell where the source of the blood is just by blowing. Sinuses produce mucus and , if infected , could drain pus and/or blood into the nose that you blow out. Sometimes, the nose itself is dry and inflamed and the blood is coming directly from the nose. Symptoms of sinus pain, pressure would suggest that the source of the problem is the sinuses. Realistically, if there is an infection, it is usually involving both the nose and sinuses.

Dry nose: This time of year it probably means your nose is dry. You can't know the nose is not the source of the blood, even if an ENT used a scope in your nose to look. If you're on oxygen, the nose is almost certainly the source. Use a saline nasal gel spray to help fight dryness, and humidify your oxygen if not already. Don't blow your nose vigorously. Try using a netipot or sinus rinse bottle.