Hi. Our Arnica Gel is licensed for pain, stiffness and bruises and is safe to use with children.
If your daughter happens to eat little fruit, she may not get all the vitamin C she needs. Vitamin C is needed to produce the collagen that keeps blood vessels strong and a shortage will result in easier bruising. Our Nature C product is suitable for children of six years and older and is tangy to the taste.
I imagine she's just enjoying herself though!