The water boiled in camphor tree bark is yellow. Cinnamomum camphora bark is the bark of Cinnamomum camphora of Lauraceae. The color is yellowish brown, with natural fragrance, bitter taste and a lot of natural yellow pigments, so the boiled water is yellow. Cinnamomum camphora bark is the bark of Cinnamomum camphora belonging to Lauraceae, which belongs to Chinese herbal medicine. It usually has the functions of killing insects, treating sores, expelling wind and removing dampness, warming stomach and stomach. Cinnamomum camphora bark is warm, pungent and bitter, belonging to spleen meridian and stomach meridian. Boiled water from camphor tree bark can be used for adjuvant treatment of some diseases, mainly including rheumatic joint pain, epigastric pain, vomiting and diarrhea, etc., and can also be used for adjuvant treatment of traumatic injury, scabies, sores and poisonous insect stings. Cinnamomum camphora bark can be taken in soup or soaked in wine, and the boiled water of Cinnamomum camphora bark can also be used directly for external use. Proper use of camphor tree bark to boil water is helpful to exert the efficacy of camphor tree bark, and taking it in moderation is beneficial to the body. When using camphor tree bark to boil water to treat diseases, we should also pay attention to taking it on time and according to the dosage according to the doctor's advice, so as to avoid improper use and possible harm to health.