is caused due to broncho-constriction (obstruction of smaller airway passages) which is indicative of Hyper-responsiveness of air passages to an allergen.
Management includes Nebulization using a broncho-dilator to provide symptomatic relief by causing broncho-dilation (dilating the smaller airway passages, relieving the obstruction & increasing airflow to lungs)
Other causes of hoarseness
of voice includes:
1. Vocal nodules- seen in very vocal children
2. Reflux laryngitis
3. Vocal cord edema
So...it will be better to consult a Pediatrician
& get a local examination of throat done to identify the exact cause.
Wishing your daughter a speedy recovery.
Let me know if I need to clarify further.
Thanks & take care.