There is no authoritative literature on the efficacy of onions in water to treat constipation, the cause of constipation is usually dyspepsia, chronic inflammation of the intestines, intestinal polyps and other factors, can be given medication and surgical treatment.
Onion as a food does not have the effect of treatment of disease. Onions contain allicin, which stimulates the secretion of gastric acid. At the same time, onions can also promote gastrointestinal motility has a certain role in helping, so onion water on the slow gastrointestinal motility caused by constipation has a certain effect, but there is no therapeutic effect.
The causes of constipation usually include chronic enteritis, indigestion, gastrointestinal dysfunction, intestinal polyps, intestinal tumors, functional constipation, etc. Usually domperidone, lactulose, probiotics and other medications can be given according to the cause, as well as surgical treatment.
All of the above drugs should be applied under the guidance of a doctor, and should not be applied blindly for unknown reasons. If constipation exists, it is recommended to go to the hospital as soon as possible and take relevant measures with the help of the doctor.