Laser is currently an effective method to remove pigmentation spots, and many candidates have been improved and eliminated by this non-invasive method, but there are also many people worrying whether pigmentation spots will come back after laser treatment. How to remove pigmentation with laser? The laser emitted by the treatment instrument can penetrate the damaged skin extremely smoothly, enter the damaged area and treat the pigment in the damaged area. The pigment will change under the powerful laser light and then dissipate on its own, thus getting cured. Due to its selective nature, it only works on the pigment particles and does not damage the normal skin. Lasers have become one of the most important means of treating pigmentation spots, but any cosmetic technology has its limitations, and so does the laser. It only removes the existing pigment, but it does not prevent the pigment from growing back. Laser can temporarily remove or lighten the pigmentation, but why can’t it stop the recurrence? If you want to solve this problem, you have to understand the formation of pigmentation. Why do spots grow? These spots are not caused by toxins in the skin, nor are they caused by toxins in the liver, kidneys and other internal organs. The skin contains a large number of pigment cells, which are very important for the skin to resist external damage such as ultraviolet rays. When there is a certain external stimulus (UV, sunlight, inflammation, etc.), the pigment cells will sense it and in order to prevent these stimuli, the pigment cells will be activated and the pigment function will be enhanced. Although these pigment cells serve a protective function for the skin, if they become overly sensitive and become uncontrollably pigmented, they can make our skin appear pigmented. There are many reasons for the enhanced function of pigment cells, mainly the following: 1. UV light This is a very important reason for the formation and aggravation of pigment spots such as melasma. UV rays can directly activate pigment cells and produce excessive pigment. 2.Estrogen effect Some pigment spots, such as melasma, are related to estrogen. Firstly, men rarely develop it; secondly, pregnancy and oral contraceptives may induce pigmentation. Elevated levels of estrogen, progesterone or related hormones can increase melanocyte activity, thus making pigmentation arise and deepen. Bad habits such as stressful living habits, partial eating and lack of sleep can also increase melanin. People with unstable sleeping time also have poor metabolic rate of skin, which will affect the production of melanin particles. 3.Heredity Chromosomal inheritance is the main cause of facial pigmentation. It mostly starts from children around 5 years old, mostly female, heavy in spring and summer, light in autumn and winter. It is a light brown to yellowish brown spot with the size of a pinpoint to a grain of rice, symmetrically distributed on the face (especially on the nose). There are many reasons for the formation of pigmentation spots, but the reasons are skin care and internal body reasons. Although laser treatment has good effect or even complete elimination, the lack of skin care after treatment, such as whether to consolidate treatment, sunscreen, improve diet, etc., will affect whether pigmentation spots recur after treatment. How to avoid recurrence of pigmentation spots After understanding the causes of pigmentation spots, you should know how to solve the problem of no recurrence of pigmentation spots after laser treatment, and pay attention to the following postoperative care problems, which should avoid many recurrence problems. After the scabs fall off, you should apply sunscreen (SPF15 or above) and also indoors to prevent the damage of UVA/UVB rays. Because the treatment area is very sensitive to sunlight, sunlight should be avoided for 3 months to 6 months, and sunscreen or umbrella should be used as much as possible to improve the treatment effect. 2, daily skin care After treatment, care should be taken not to use poor quality cosmetics and peeling, exfoliating, hormonal products. It is recommended to use medical skin care products, 3, daily diet You can eat more food containing vitamin C and E or take vitamin C orally, and try to reduce alcohol, coffee, smoking, spicy substances and other stimulating foods.