Symptoms of constipation include: 1. Hard stools, difficulty in defecation or pain during defecation. 2. 2. Straining to complete a bowel movement. 3.The number of bowel movements is less than usual. 4.After defecation, abdominal pain is relieved. 5.Bleeding from hemorrhoids and anal fissures caused by defecation. 6.Wet or diarrhea-like stools leak out between normal bowel movements. If the following symptoms occur, you need to see a doctor: 1.Constipation with fever and abdominal pain and bloating. 2.Constipation accompanied by vomiting or poor appetite. 3.Blood in the stool may be due to anal fissure or hemorrhoids, but it may also be a symptom of colorectal cancer. If there is a change of stool habit and thinning of stool, it may also be a symptom of colorectal cancer. 4.If constipation occurs after taking new medication or nutritional products, you need to stop the medication or change the dose. 5.Constipation lasts for two weeks. 6.Constipation in elderly or disabled people for more than one week and dry stools. 7.Constipation and weight loss, and not dieting.