Hi, Welcome to HCM, I had gone through your question and understand your concerns. As per your details, smoking can cause drying of nasal mucosa , on removal of dried crusts, there is a chance of bleeding. raise in Bp secondary to smoking is also a cause. dizziness can happen with raise in Bp, sudden bleeding. vomiting and loose stools are the symptoms of gastroenteritis. you need to evaluate with an ent surgeon for farther evaluation and treatment Hope, I have answered your query, all the best, take care.