Is it on the right side, left side, or both?
Your daughter probably has got Thoracic Outlet Syndrome ( NTOS) and Carpal Tunnel Syndrome which might cause from trauma ( acccident, repetitive movement in occupational or sporting activities), poor posture ( forward head posture), or carrying heavy objects.
2, She can't smell or taste things like normal...
The carotid artery might be compressed due to Trauma or poor posture.
You should go to see a doctor and take an MRI scanning in order to identify and localize TOS and other nerve entrapmetn syndromes.
