[-Prodigy-]

To remove their score:

pawn Код:

SetPlayerScore(playerid, GetPlayerScore(playerid) - 20);

To save their HP:

pawn Код:

new Float: HP[2]; // Global or something

// when they use the cmd:
GetPlayerHealth(playerid, HP[0]);
GetPlayerArmour(playerid, HP[1]);

SetPlayerHealth(playerid, 99999999);
// when you want to give their health back
SetPlayerHealth(playerid, HP[0]);
SetPlayerArmour(playerid, HP[1]);