Since how many days is she having this pain? And has she had a similar pain in the past? Also has she taken any medication for the same?
As per your description, the main causative factor for this severe pain seems to be the wisdom tooth which classically radiates to the entire jaw on the same side (upper and lower). It could be a decay or the tooth’s positioning which may have caused this pain associated with an infection. However, conclusive diagnosis and treatment plan can be derived after a thorough check up and radiographic examination.
Next Steps
Kindly seek a specialist’s IMMEDIATE ATTENTION for the tooth as the symptoms described by you are indicative of a severe infection.