What causes rough and yellow skin?

My skin has become rough and yellow in recent years. What should I do? What caused this? I have to put on makeup every day when I go to work. I dare not go out without makeup. I also often use various facial masks, hoping to make my skin return to its previous state. However, no matter how hard I try, the roughness and yellowing of my skin have not improved. I am always worried all day and often have to look in the mirror to see if my makeup is smudged. I just want to know what caused my skin to become rough and yellow in recent years so that I can gradually correct these bad things.

1. Poor rest and insufficient sleep. Nighttime sleep is the most active time for skin cell renewal. If you go to bed too late or get insufficient sleep, the metabolic function will no longer be smooth, causing the aging stratum corneum to thicken, the skin to lose its transparency, and appear grayish in color. People who suffer from poor sleep for a long time will naturally have dull skin, and no whitening products will help.

2. Stress: When we are under stress or overly tired, our body will be in a state of tension, causing blood vessels to constrict, poor blood circulation, and a dull complexion. However, excessive fatigue will slow down the skin's metabolism and the complexion will become darker due to the accumulation of dead skin cells.

3. Dryness: If the skin is dry, the stratum corneum lacks moisture and the skin color appears dark and yellow. In addition, fine lines will appear on dry skin, which are sometimes difficult to see without careful observation. However, skin with many fine lines looks like it is covered with a layer of dust and appears dark yellow.

4. Smoking Smoking will cause blood vessels to constrict, produce a large number of free radicals in the body, and make your face dull. Cigarettes can also destroy vitamin C, which has the effect of inhibiting melanin and is very important for skin health. In addition, smoking smoke can also dirty your pores and make your skin look duller.

5. Incomplete cleansing: When foundation is on the skin for a period of time, it will mix with sebum and dust to form dirt, which will then oxidize and deteriorate. If you don't clean your face thoroughly, dirt will remain on your face and your complexion will become dull and lifeless.

6. Ultraviolet rays can tan the skin, while UVA can penetrate into and damage the dermis, invading collagen fibers and elastic fibers, causing them to deteriorate and remain in the dermis as lumps, causing the skin to lose its translucency and become yellowish and dull.

7. Skin aging

The above are all the suggestions my friend gave me about what to do if my skin becomes rough and yellow. After listening to her, it suddenly dawned on me that I usually only focus on my children and this family. I have completely neglected myself. Time is a butcher's knife. I didn't take good care of my skin and it became like this. I want to make myself young again quickly.