Quoting Socialty Forman:" THEY HURT FOR A SECOND AND GO AWAY THEN A SECOND LATER THRE COMEING RITE BACK"
Contracts are like waves of pressure and they hurt. Braxtons Hicks contractions are like tightening of the belly. Neither one of these last for just a second. They normally last a min. then (with contractions) you have 3-10 mintues between depending on what stage your at. With BH contractions there is an undefined amount of time between them. Normally your belly gets really tight for a minutes and then sometimes you don't even get another one. If you are feeling sharp pains that last a second... you have a ligament that is stretching... which is normal and has nothing to do with labor.