Dark skin may be poor health. You should go to the hospital to see a doctor and let him ask you questions. If there are no special circumstances, you should pay more attention. Rest may be your skin, your skin is too handsome, there may be something wrong with your working environment, it may be that your working environment is hot, and if your working environment is cold, it will definitely not be dark. Why? Hehe, it may be a genetic problem. I hope to adopt my answer. Thank you.