But I estimate that 80% is an unhealthy way to lose weight. Dieting or taking diet pills is not good for your health, but most girls don't care because they want to be beautiful, right? Now that you have had an adverse reaction (if it's not because you stay up late and look haggard and dark, then I can definitely say that it's 100% because you've lost weight), some drugs may cause endocrine disorders and metabolic disorders, the most obvious manifestation is the skin, and some will appear spots and so on.
So now I suggest you stop losing weight, keep a normal diet, rest every day, see if your skin condition has improved, and then decide what to do in the future, okay?
I hope you can become white again!