Is it normal to not have a bowel movement for three days?
Defecation refers to bowel movement. Generally, not having a bowel movement for three days may still be normal if no other discomfort occurs; however, if accompanied by other symptoms, it is considered abnormal and medical attention is recommended. Below is a detailed analysis:

Individual bowel habits vary—some people may defecate daily, while others may only have bowel movements every few days. If a person normally has bowel movements every few days and experiences no other discomfort, going three days without defecating may simply be a normal physiological pattern.
If not defecating for three days is accompanied by symptoms such as abdominal pain, bloating, nausea, vomiting, or difficulty passing stool, this may indicate constipation, which is an abnormal condition. Constipation may be related to an improper diet, insufficient fluid intake, or poor bowel habits. It is recommended that patients follow medical advice and take medications such as lactulose oral solution, senna granules, or new compound aloe capsules for treatment.
In daily life, drinking warm water appropriately is recommended, as it helps lubricate the intestines and facilitates bowel movements.