Hemorrhoids happen to be swollen veins found in the lower rectum and anus.  These can occur from excessive pressure on these veins, often due to prolonged straining during bowel movements.
Symptoms may range from https://www.facebook.com/proctologiaclinica/posts/sangue-nas-fezes-n%C3%A3o-%C3%A9-sempre-hemorroidaneste-carrossel-voc%C3%AA-vai-ver-em-poucos-c/1435381361464877/