Your body has a lot of bacteria, and most of them are good for you. They have a lot of useful functions for your skin.
But, there is a chance that harmful bacteria might occupied your skin. So if you don’t wash, they will get into your body and get you sick.
After just two days without shower, the harmful bacteria start to develop too fast. The sweat also encourages the development of those bacteria.
In other words, after just two days without shower we become a target for a variety of microorganisms.