These causes include chronic constipation leading to straining with bowel movements and being overweight. Saying anal sex can cause hemorrhoids obviously makes no sense when referring to the hemorrhoidal cushions. They will be able to help you identify the potential causes of your hemorrhoids. WebMD does not provide medical advice, diagnosis or treatment. Fruits, whole grains, and vegetables form the base of a well-balanced diet, and this helps produce soft but formed, regular bowel movements. Leave this field blank. Not all medical doctors will make a distinction, either; some of them refer to symptomatic hemorrhoids as merely "hemorrhoids," perpetuating people's misconceptions.