smell bad of shoes or foot odor that can be unplesant and embarrassing for you and people around you,and they can effect with anyone. To begin with,wearing the same shoes for a long time. For example,my friend and me have classes all day. So,we can not take of the shoes. In furthermore,poor personal hygine.For instance,my friend have classes all day and past time job that can effect her no time to clean shoes.Finally,wearing shoes and socks that not evaporation. As an example,if you wear socks and shoes,you are exercising the moisture gets trapped that can effect the foot to smell bed