How do you lose life points in yu gi oh?

Answer 1

There are many ways to lose life points. Every player starts out with 2000 at the beginning of the duel. Some cards say to inflict this much damage to your or your opponent's life points often after a certain requirement has been fulfilled or to pay as a cost for a certain effect. The most common example of losing life points though, would be if one player attacked another player with a monster with atk points higher than the opponent's atk position monster. The difference between their atk points would be inflicted to the person with the lower atk point monster.