Touch Of Power by Maria V. Snyder

Yelena is a healer with a mysterious past and an extraordinary gift—the ability to sense and mend injuries with a single touch. When she's captured and forced to heal the military's soldiers, she discovers her power comes with a dangerous price. As she uncovers the truth about her abilities and the world around her, Yelena must decide whether to use her gift to save lives or reclaim her freedom. A captivating fantasy adventure filled with magic, danger, and self-discovery.