Hello Thank you for contacting HCM. Sneezing mostly occurs because of allergic response. As you have chronic allergy problem so there must be some allergic element which triggers sneezing. If i were your treating doctor then i would have advised levocetirizine for it. Also i would have suggested montelukast once daily for one month. Blood spit occurs because of severe sneezing response. It damages the mucosal lining which in return results in blood spitting. I would also suggest you to visit an allergist for detailed examination of what is the causative allergen and then he will prescribe immunotherapy which will resolve it hopefully. Thank You