In traditional Hmong culture, medicine is categorized as either spiritual or non-spiritual. For spiritual illnesses, a shaman is called upon who can communicate with spirits to diagnose the problem and offer animal sacrifices as part of healing ceremonies. Kao Kalia Yang's grandmother was a shaman who used herbal remedies, performed healing rituals like a shaman's walk, and sacrificed animals to spirits to cure illnesses described in The Latehomecomer. Hmong shamans use tools like gongs, rings, and buffalo horns to assist in spiritual ceremonies that are an important part of traditional Hmong medicine and culture.