Child has a nosebleed, what are the causes or reasons?

Patient's question:

Main symptoms: Nosebleed, Onset time: 7:00, Test results: None

Doctor's answer:

Hello, there are many factors or causes that can lead to this, such as a decrease in platelets, rhinitis, or internal heat, and abnormal blood vessels in the nasal cavity, etc. It is recommended to go to the hospital for a clear diagnosis.