In traditional Chinese medicine, gromwell is taken internally to cool blood and invigorate the blood circulation system. Externally, it is said to help to reduce itching and relieve eczema. The soap was made from an infusion of gromwell root to get a purple hue in it. The depth of color may differ based on formulation.
Purple Gromwell root has been used for many centuries due to their extraordinary healing and anti-inflammatory, antiseptic properties and is used for soothing and healing skin wounds.