BH can be very painful sometimes, in my last pregnancy they were usually more painful than my early labor
contractions. BH, however, do
not contract the entire uterus. Labor
contractions start at the bottom of your uterus and spread up tensing the entire uterus. My experience with BH they usually started on the side moving forward, but always left a soft spot at the top. BH are irregular, but may continue for a long time. If they last more than an hour contact your doctor.