Aromatherapy Functions in Chinese Medicine Increases the Guardian Qi; Fights Infection: tonsillitis, headaches, severe sinus infections, bronchitis, asthma, throat and mouth infections, colds and flu, fever. Rectifies the Skin; Rectifies the Joints: cuts, sores, boils, acne; arthritis, muscle aches and pains, rheumatism, injuries and sprains; sciatica. Transforms Damp; Rids Phlegm: coughs, catarrh. Tonifies the Kidney: urinary and kidney infections, nervous exhaustion.