Hi I suffer from hay fever and sinus regulary and from time to time I have noticed blood in my nasal drip and sometimes in clear coloured nasal drip I notice this in the mornings only, I wake up and need to spit out the nasal drip from my mouth and it sometimes contains blood. I can treat my sinus without requiring anti-bitotics, I use a saline nasal spray and apply a warm cloth that has been soaked in warm water and eucalyptus oil to the area and it assists in clearing the mucus.