You can hack HP, thanks to the trick NoFear1183 shared.
The HP value for 50( when you have nothing equipped) is: 3.140625
After searching that value, equip wooden armour, your HP will become 85. Now you need to search value for 85 which is: 3.33203125
Now there should be only two values. Just change to 10 or 20. But keep in mind the HP will not change permanently. You need to freeze it for unlimited hp. You need to do this every time you load the game.