Impact conditioning/Hard body tips?

What the people above me say is true. You can damage your hands even with the tiger balm and other creams you're using. I think you're over-doing it (10 mins.) Try maybe 2-3 minutes with the text book and then just do without it. You might even be doing it wrong because you self teach and your technique might be slightly off and you could be damaging your hands even more. Don't use the text book and use the creams before and after your training.