Yellowish and dull face is related to many factors, such as the candidate’s own skin color is relatively dull, or due to improper use of cosmetics leading to damage to the stratum corneum, skin discoloration. Candidates may work and live in an environment where the air and sun radiation are relatively high, resulting in damage to the stratum corneum, which can also occur, and there are also cases where the candidate’s own metabolism is slow, or endocrine disorders lead to dull skin. Regardless of the cause, it is important to improve the skin’s condition from the root, which means paying attention to skin hydration, moisturizing and sun protection. This allows the various cells within the skin to be in a moist, humid environment, which has a very good effect on the regeneration and repair of the skin, and then with the corresponding laser treatment, the dull skin can be slowly restored to a normal state.