 [ Symptoms ] can a cpap machine cause blood in the sputum  i started using a machine a week ago first with pillows which did not work because of my sinuses and now with a full mask it has humidity in it i am 57 yrs old i have never had blood before when i cough up what drained down during the night i am coughing very little the blood is bright red i am a mouth breather because my sinuses are always clogged up is that small amount of blood anything to be concerned about  [ Disease ] having vertigo is ok but for 2 years should be something to worry about it can be caused due to ear problems or neurological reasons i feel you should first consult a otorhinologist tumours and similar conditions seem less likely as they are frequently associated with systemic symptoms