The efficacy of peppercorns in water is to warm the middle and relieve pain (by warming the spleen and stomach to relieve pain). However, it should be noted that the active ingredients of the medicine in water are limited and cannot replace the medication. If you need to use medication, it is recommended that you take the medication in the form of a decoction under the guidance of a professional doctor. Pepper, for the rue family plant green pepper or pepper dry mature fruit skin, its efficacy for the warm pain, kill insects and itching, mainly used for the treatment of cold stomach and abdominal cold pain (gastric and abdominal cold pain), vomiting and diarrhea, eczema (allergic inflammatory skin disorders, symmetrical distribution of lesions, polymorphic damage, intense itching, recurrent episodes), itchy pubic, insect abdominal pain and other diseases. Pepper can be used internally or externally, decoction for internal use; decoction and fumigation for external use. The adverse reactions and contraindications of peppercorns are not clear. It should be noted that if you need to use peppercorns in water, it is recommended that you use them under the guidance of a doctor to avoid delays.