Vitamin AD drops have a lubricating effect on the nasal mucosa. Generally, when the nasal mucosa is dry and eroded or has chronic inflammatory stimulation, there will be nosebleeds, and there will be dry and painful symptoms in the nose. If it causes persistent nasal congestion or nosebleeds are serious, you need to conduct a systematic examination to rule out other diseases of the nose, such as rhinitis or nasal polyps, hemangiomas, etc., and then targeted treatment.