[iggy1]

pawn Code:

dcmd_healme(playerid, params[])
{
    new
        id;
    if(sscanf(params, "u", id)) return SendClientMessage(playerid, 0xFF0000AA, "Usage: \"/healme\"");
    else
    {
        SetPlayerHealth(id, 100.0);
        SendClientMessage(id, 0x00FF00AA, "You have been healed");
        return 1;
    }
}

If i understood correct that should do it.

EDIT: Just realised its a healme cmd and not healplayer durr.