The body's natural healing mechanisms

My sister recently took part in a charity walk, during which she aquired some blisters on her feet, which got me thinking about how the body is so intricately designed to heal and to prevent further damage. Following the example of blisters, I researched them and found that the liquid contained within them protects the tissue below from further damage. This reminds me of how important it is to take into consideration the body's natural healing process, as often it is cleverer than we think; from simple growth and repair by mitosis, to the specific immune responses of B- and T- lymphocytes. I think it's important to remember that however much technology we develop, much of treatment relies on the body to perform the basis of the healing process.