Can a 9-month-old baby soak in mugwort every day?

Generally speaking, it is not recommended to bathe a 9-month-old baby in mugwort (Artemisia argyi) water every day. The use of traditional Chinese medicinal materials should follow medical advice. Specific analysis is as follows:

A 9-month-old baby has very delicate and sensitive skin. Mugwort has certain irritant properties; daily exposure may damage the skin's natural barrier, leading to dryness, redness, itching, or even allergic reactions. Moreover, at nine months old, a baby’s body systems are still immature. Some components in mugwort may cause excessive internal "yang" energy, resulting in heatiness symptoms such as increased eye discharge, mouth sores, tongue ulcers, and irritability. In addition, mugwort leaves contain a volatile oil that should not be inhaled in large amounts, as excessive exposure may affect health, suppress the nervous system, and lead to dizziness, headaches, and mood changes.

In specific cases—such as when the baby has a constitutionally cold body type or suffers from eczema—mugwort may be used only under a doctor's guidance, with strict control over bathing duration and frequency to avoid adverse effects on the infant.