Blood in the toilet in early pregnancy may be caused by hemorrhoids, preeclampsia, placenta praevia, colorectal cancer and other reasons. 1. hemorrhoids: pregnant women in the process of pregnancy, the uterus gradually increase, will be on the local pelvic venous plexus caused by pressure, causing venous reflux is not good, this situation is easy to aggravate hemorrhoids, resulting in hemorrhoids bleeding. 2. Pre-eclampsia: If pre-eclampsia occurs in early pregnancy, bleeding is possible. 3. Placenta praevia: Pregnant women with placenta praevia, especially complete placenta praevia, may cause detachment of the placenta from the uterus and cervical attachment surface under the action of external force, which may lead to bleeding. 4. Colorectal cancer: if pregnant women have colorectal cancer during pregnancy, the infiltration of cancer cells will cause local tissues to break down and bleed. If there is blood in the toilet in early pregnancy, one should distinguish whether it is anal bleeding or vaginal bleeding. If you cannot distinguish, you should go to the hospital in time to find out the situation. Pregnant women should have regular checkups during pregnancy and seek timely medical attention if they become unwell.