No nasal congestion but blood in nasal mucus may be caused by dry rhinitis, atrophic rhinitis, acute sinusitis, nasopharyngeal carcinoma, etc. It can be treated by improving the living environment, taking antibiotics and surgery. 1. Dry rhinitis: The decrease of nasal secretion and the dryness and rupture of nasal mucous membrane will lead to the manifestation of blood in nasal mucous, which can be treated by physiological seawater nasal spray, compound menthol nasal drops and vitamin A and C supplementation to alleviate the symptom of dryness of nasal cavity. 2. Atrophic rhinitis: due to the thinning and drying of nasal mucosa, or capillary damage caused by nose picking and blowing with force, generally bleeding is not much. Supplementary vitamins and trace elements, saline nasal rinsing, local use of 1% compound menthol camphor oil, cod liver oil, paraffin oil and other nasal drops, lubricate the mucous membrane, promote mucosal blood circulation and soften the pus crusts, so that it is easy to blow out. If medication is not effective, the nasal cavity can be narrowed surgically. 3. Sinusitis: mostly caused by upper respiratory tract infections, bacterial and viral infections lead to the onset of sinusitis. Because of the inflammatory secretions and inflammatory factors continue to stimulate, resulting in nasal mucosa damage bleeding, nasal discharge with blood, can be treated by taking antibiotic drugs, such as amoxicillin, cefuroxime and other drugs. It can be treated by taking antibiotic drugs, such as amoxicillin, cefuroxime and so on. Those who are allergic to these drugs are forbidden. 4. Nasopharyngeal cancer: patients may be caused by family heredity or viral infection, and their blood vessel wall is not well developed, which is easy to rupture and cause bleeding symptom, resulting in the situation of no nasal congestion but bloody nasal discharge, which can be treated by radiotherapy to control the cancer, and nasopharyngeal carcinoma resection and cervical lymphatic drainage if there are localized lesions left. If there is no nasal congestion but bloody nasal discharge, one should go to the hospital in time to check the cause of the disease, and use medicines under the guidance of the doctor and carry out targeted treatment.