What causes rectal bleeding during pregnancy?

Aug 24, 2022 Source: Cainiu Health
Disease description:

My sister is pregnant and has noticed bleeding during bowel movements. I'm not sure what's causing it, so I'd like to ask: what could be the reason for bleeding during bowel movements in pregnancy?

Doctor's answer (1)
Dr. Chen Zhe
Rectal bleeding during pregnancy may be caused by constipation. After becoming pregnant, women often consume a richer diet with more high-fat foods to ensure better nutrient absorption for the fetus. This can lead to dry stools and constipation, making bowel movements difficult. Excessive straining during defecation may tear the anal tissue, resulting in rectal bleeding. Adjusting the diet can help improve this condition; it is recommended to eat more fresh fruits and vegetables.