['To analyze the causes of misdiagnosis in patients with familial nasal bleeding and to improve the level of diagnosis and treatment.', 'The clinical characteristics of 7 families with nose blood were analyzed retrospectively and 2 typical cases were reported, including their treatment and misdiagnosis in consulting, out-patient and in-patient.', 'Typical case 1 was misdiagnosed and mistreated for 42 years, misdiagnosed as blood disease so that the patient was biopsied in bone marrow, misdiagnosed as endometriosis so that the patient was performed uterus resection. Typical case 2 was misdiagnosed and mistreated for 17 years, misdiagnosed as upper digestive tract hemorrhage so that the patient was performed endoscopic sleeve ligation, misdiagnosed as inferior turbinate hemangioma so that the patient was performed nasal endoscopic surgery.'] Does [ cause analysis of misdiagnosis in patients with familial nasal bleeding ]?