Wax is a good option if you want smooth chest and back for a while. If you wax regularly, the hair tends to grow back thinner and finer, which makes it a better choice than shaving. On the other hand, the hair will grow back harder and thicker if you choose to shave your back or chest. It is also not practical to shave your own back. Besides, you will feel itch as the stubble re-grows on your back. You can go to a beauty salon for waxing so you will get smoother and longer lasting finish.

If you want a permanent solution, you can try laser hair removal. After completing the treatment process, you do not need to worry about your hairy chest and back any more. However, the treatment is quite expensive, and often have side effects such as skin burns.