Nose bleeding is very common in childrens as they use fingers to put in nose and for crust removal.. it causes trauma to nasal mucosa and bleeding.. In most of patients it will subside easily on stopping nailing nose and all those why you alrdy used. If it's not resolving even after all these measures  child needs minor blood tests Endoscopic examination of nose Then cect nose and PNS. Mostly it's due to trauma in 70 % cases. Don't worry madam.

Get CBC ,Coagulation profile ,Do CT scan PNS and Consult online for further evaluation.

Check if she is having adenoids, adenoids can give raise to nasal bleeding if not treated promptly.

Any nasal.blockage ? frequent cold ? Any snoring at night ? Any history of nasal picking ? If it bleeds a lot and ut doesnt get better even whem taking medications, take a pediatric opinion and also go for bloor coagulation profile once to rule out any systemic blood problem.

Any history of nasal discharge nd nasal crusts??does she use fingers to remove any crusts within d nose??