Thank you for your query.
It has been reported that curves in the lower thoracic region (chest) cause pain. As you have not mentioned the vertebrae that are involved in Scheuermann's disease I presume that the thoracic vertebrae
are involved which is giving rise to the chest pain
being experienced by your daughter. I suggest you continue with the advice of the orthopedic consultant and ensure regular physiotherapy
I hope I have answered your query to your satisfaction.
Wishing your daughter an early recovery.