Compound Phellodendron Bark Liquid has the efficacy of subduing swelling, dispelling rot, clearing heat and removing toxins, and has a certain therapeutic effect on perianal eczema with yang evidence. Compound Huangbai Liquid is mainly composed of honeysuckle, centipede, cypress, forsythia, dandelion and other traditional Chinese medicines, with the efficacy of subduing swelling and removing corrosion, clearing away heat and detoxification, and it can be used for the treatment of sores and ulcers after ulceration and wound infections, which belong to the yang syndrome. Compound Phellodendron Bark Liquid is for external application, not for internal use, its adverse reactions and contraindications are not clear, pregnant women should be cautious, allergic to its allergy and allergy should be used with caution. Patients suffering from perianal eczema should be timely medical diagnosis and treatment, in addition to compound huangbai liquid need to be used under the diagnosis of traditional Chinese medicine, can not be used blindly, so as not to cause damage.