Brown nasal mucus after getting up in the morning is usually a manifestation of nasal mucus with blood, which may be caused by factors such as nose picking, sinusitis, nasopharyngeal fibrous hemangioma. 1. Nose picking: often digging the nostrils, may lead to nasal mucosa erosion, ulceration, and even bleeding, generally less bleeding, manifested as reddish-brown. 2. Sinusitis: patients with sinusitis usually suffer from increased secretions due to the stimulation of inflammation in the nasal cavity, resulting in nasal congestion, runny nose and other symptoms. If they blow their noses frequently, it may lead to the rupture of capillaries in the nasal mucosa and bleeding. 3. Nasopharyngeal fibrovascular tumor: the blood vessels of the tumor in the nasal cavity and nasopharyngeal cavity are relatively brittle, if the mucous membrane on the surface of the tumor tissues is eroded, or even ulcerated, therefore, there may be oozing of blood at night, and blowing out the brown secretion in the morning. Brown nasal discharge, at this time, it is recommended to actively seek medical attention to clarify the diagnosis, to avoid delaying the condition.