Patchouli Zhengqi Shui is generally used for internal use, it is not clear whether it is harmful for children to use patchouli Zhengqi Shui on the navel, but if the child is allergic to patchouli Zhengqi Shui, it may produce the harm of skin allergy. Patchouli Zhengqi Shui has the efficacy of relieving the surface and resolving dampness (relieving the evils of external sensation and getting rid of dampness in the body), regulating qi and neutralizing the middle (regulating the qi of the spleen and stomach to make the functions of the spleen and stomach smooth). This medicine is used for colds and flu caused by external wind-cold, internal dampness stagnation (the stagnation of dampness in the body caused by a cold diet) or summer dampness (the body is easily violated by summer heat and dampness in the summer), with symptoms such as headache, heaviness, chest and diaphragm constriction, distension and pain in the epigastrium, vomiting and diarrhea; gastrointestinal colds with the symptoms mentioned above. The effect of oral administration of Huo Xiang Zheng Qi Shui is more obvious, the absorption efficiency of external application of navel is relatively low, it is not easy to achieve the effect of improving symptoms, most of the children with Huo Xiang Zheng Qi Shui external application of navel will not produce harm. If the child is allergic to the ingredients in Huo Xiang Zheng Qi Shui, then the patchouli Zheng Qi Shui external navel compress may stimulate the skin, causing itching, rash and other allergic manifestations. It is recommended that children allergic to patchouli zhengqi water to avoid giving children with the drug, if the children are not allergic to patchouli zhengqi water, you can use patchouli zhengqi water under the guidance of a doctor, the use of the same time the need for adult supervision.