One needs to come to terms with how they look. You need to have courage to stand in front of the mirror and embrace all your imperfections. You need give away your urge to perfect all the blemishes, and bodily irregularities such as your weight, complexion and other deformities. Yes, certainly if it's possible without any adverse reaction, you should improvise your appearance to better your lifestyle. An end that is the sheer improvement of your facade to appear more appealing by means of harming your biological self should be a big NO NO. That what harms you but is appealing for the observer is not beauty - it's a sham.