Freckles: determined by genetic inheritance and cannot be completely cured. 1. Freckles have a strong hereditary nature, and a variety of factors can aggravate freckles. Freckles are pinpoint to rice-sized spots, ranging from light brown to dark brown, mostly found on the forehead, nose and cheeks. Zhang Ji-xun said, “Freckles are the most common disease inside the skin disease and are very hereditary; if one or both parents have them, the child will usually have them, and there are not many single-onset ones.” Freckles are the result of a combination of various aspects, and the exact cause is not very clear. In addition to genetic factors, the severity of freckle symptoms is related to living habits, environment, diet, endocrine, etc. For example, people who often work outdoors and receive direct sunlight and ultraviolet radiation will aggravate freckles. Irregular diet, excessive stress and women’s menstrual cycle can also cause freckles to increase and deepen in color. 2. Cosmetics and laser freckle removal can only improve the symptoms, but not once and for all. There are many ways to treat freckles, the most common ones are using topical drugs and cosmetics to remove freckles. However, Zhang Ji-xun pointed out that these ways can only control and lighten freckles to a certain extent, but not once and for all. “Some cosmetic products for removing freckles have good effect at the time of use, but the effect sustainability is generally not strong, as is the case with ordinary spot removal products and medicinal spot removal products, because the skin is constantly metabolized. Physical treatments such as photons and lasers are also treating the symptoms but not the root cause, they can only improve the external symptoms, and the duration of the effect varies from person to person and is closely related to the future care.” Zhang Ji-xun reminded, “Whether you use spot removal cosmetics or choose laser and photon spot removal, you should pay attention to good post-care, try to avoid ultraviolet radiation, don’t eat spicy and stimulating food, don’t drink coffee and strong tea, ensure sufficient sleep and keep good mood, etc., so as to make the effect more lasting.” 3, laser freckle removal and photorejuvenation should choose regular hospitals and experienced doctors. Although freckles have no effect on health, many people still hope to lighten the pigmentation through some ways. In this regard, Zhang Ji-xun suggested that the drug-based blemish removal cosmetics in regular hospitals have regular batch numbers and are clinically tested, so the problem is generally not big. However, there are many kinds of cosmetics on the market today, and their quality varies, so pay attention to identification and selection when buying. In addition, “don’t easily believe in those too magical advertising campaigns because, until today, there is no way to cure freckles permanently and completely.” Chang Ki-hoon reminded. For photonic and laser skin rejuvenation, Zhang Ji-hoon said, “Generally speaking, you can choose laser treatment for freckles as soon as you are past puberty. Laser treatment will have a hot sensation, there is no obvious pain, there is no need to worry too much. The cost of treatment varies greatly from hospital to hospital, but most families can afford it. It should be noted that this treatment mainly depends on the operation level of the doctor, because photorejuvenation and other procedures need to control the energy of light, and poor operation can cause damage to the skin, so choosing a regular hospital and an experienced doctor is the key.”