Pepper foot washing has the effect of killing insects and relieving itching. It is suitable for eczema patients. If you need to use drugs, you need to use under the guidance of a doctor. Peppercorns are pungent in flavor and warm in nature; they are attributed to the spleen, stomach and kidney meridians. For the Rutaceae pepper plant green pepper or pepper dry mature fruit skin. As a traditional Chinese medicine, pepper has the efficacy of warming the middle and relieving pain, killing insects and relieving itching. It is mainly used to treat patients with cold pain in the epigastrium, vomiting and diarrhea, and abdominal pain from insect accumulation. Externally, it can be used to treat eczema and pubic itch. Generally, it can be used internally as decoction, or in pills or powder. It can also be decocted into water for washing or gargling. Externally, it can be used to soak feet and so on. Patients are advised to choose the correct treatment method and appropriate dosage according to the dialectical guidance of Chinese medicine practitioners.