If you want to stay alive then taking damage might not seem like the best idea, but in the early game it can be worth it. If you hide out on the edge of the blue circle you will take small amounts of damage, but no one will expect you to be out there. With some good healing options you can stay there for quite a long time and avoid fights entirely. You may even be able to pick up a few kills on unsuspecting foes. But you always keep an eye on your health and the next circle.