She’ll nurse you back to health at her uncle’s mill in Rattay. She’ll return the favor later when you head back to Skalitz to (try to) bury your parents. A little later, you (can) save her from the attention of some soldiers as you sprint past on your way out of town during the “Run!” quest. Theresa’s part of your introduction to the game back in Skalitz - you have to give her some nails.
