Lemon slices in water have certain effect on removing spots, but the effect is limited and requires long-term persistent drinking. There is a strong individual difference in the effect of removing spots, which needs to be considered according to the type of spots and the patient’s physique. Lemon slices contain a certain amount of vitamin C, which has a certain effect on the removal of free radicals in the body, playing a part in protecting the skin and clearing the intestinal tract, and also slowing down the generation of melanin in the skin and decomposing the melanin in the skin to achieve whitening and spot removal effects. Lemon water whitening and blemish efficacy mainly depends on vitamin C, which is limited in lemons. Even if you drink it for a long time, the effect may not be obvious. In addition, lemon contains light-absorbing substances, which may lead to skin pigmentation after ultraviolet radiation, so it is recommended to drink lemon water at night before going to bed. If you want to achieve obvious effect of spot removal, you can go to a professional dermatology hospital and let the doctor choose a suitable spot removal method according to the situation, such as laser spot removal and medication spot removal. Laser treatment has faster effect, mainly using specific wavelength of laser to penetrate into the surface layer and dermis of the skin to destroy the melanin producing cells and pigment particles to achieve the effect of spot removal; drug spot removal needs to be combined with specific spot characteristics for symptomatic treatment, such as external application of tranexamic acid has certain effect on melasma and sun spots. Usually, you should pay attention to sun protection in your life, and you can apply sunscreen when you go out. Eat less spicy and stimulating food to avoid aggravation of skin spots.