With extracts of frankincense, comfrey, calendula, California sagebrush, and cayenne pepper, this herbal salve is safe for external use topically. 
 
The ingredients of this salve are known for their properties:
Comfrey: This herb is known for its wound-healing properties. It contains compounds that can promote    tissue growth and regeneration.
California sagebrush: This plant is native to California and is often used for its anti-inflammatory and antiseptic properties. It may help soothe irritated skin and reduce inflammation.
Cayenne: It can temporarily relieve pain by desensitizing pain receptors.
 
While all these natural ingredients are generally considered safe, it's essential to patch test the salve on a small area of skin before applying it to a larger area, especially if you have sensitive skin.