Nasal cavity old blood crusts can be nasal mucosa or capillary rupture disease, common cause of dry rhinitis, atrophic rhinitis, nasal septum deviation, can also be caused by nasal tumors, according to the cause of the hot towel on the nose, lubricating nasal drops, medication or surgical treatment and other methods of disposal. 1. Apply hot towel to the nose: applying hot towel to the nose can dilate blood vessels, improve blood circulation, increase the humidity of the nasal cavity, alleviate the dryness of the nose, and help the crusted capillaries recover better. 2. Nasal drops with lubricating drops: Nasal drops with lubricating drops have the effect of preventing mucosal edema, regulating osmotic pressure and viscosity, and can promote the nasal mucosal secretion to increase and alleviate the symptoms of the old bloody crust in the nasal cavity, commonly used medicines are compound menthyl drops, cod liver oil drops and so on. 3. Drugs and surgical treatments: the cases with nasal sinus tumor will also have this symptom, which can be accompanied by olfactory impairment, nasal congestion, nasal pain, and even dizziness, headache and other symptoms, and when the effect of conservative treatments is not good, the patients can choose the comprehensive treatments including surgical treatments. If the patient has the situation of blood crust in the nasal cavity, it is recommended that the patient should consult the doctor in time to find out the cause of the disease, and after the doctor clarifies the cause of the disease, the patient should be given targeted standardized medication and treatment.