1. ultraviolet rays: when exposed to ultraviolet rays, the human body will produce a lot of melanin in the basal layer in order to protect the skin. Therefore, in order to protect the skin, more pigments will gather in sensitive parts. Frequent exposure to strong sunlight will not only promote skin aging, but also cause skin diseases such as black spots and freckles. 2. Bad cleaning habits: Because of strong cleaning habits, the skin becomes sensitive and will stimulate the skin itself. When the skin is sensitive, in order to protect the skin, melanocytes will secrete a lot of melanin. When there is too much pigment, there will be skin pigmentation problems such as spots and flaws. 3. Wrong use of cosmetics: using cosmetics that are not suitable for your skin causes skin allergies. In the process of treatment, if exposed to excessive ultraviolet radiation, the skin will gather melanin in the inflamed area to resist external invasion, which will lead to pigmentation. Internal factors 1. Heredity: if parents have spots, the probability of spots is very high, which can be judged to be genetic to some extent. Therefore, people at home, especially those with spots on their elders, should pay attention to avoiding ultraviolet radiation, which is one of the important factors causing spots. 2. Stress: When people are stressed, they will secrete adrenaline to prepare for stress. If you are under stress for a long time, the balance of human metabolism will be destroyed, the supply of nutrients needed by the skin will tend to be slow, and the pigment mother cells will become very active. 3. Hormone secretion disorder: The female hormone estrogen contained in contraceptives will stimulate the secretion of Melanie cells and form uneven spots. Although the spots formed by birth control pills will stop after taking medicine, they will still stay on the skin for a long time. During pregnancy, due to the increase of female hormone estrogen, spots are easy to appear from 4-5 months of pregnancy, and most of the spots that appear at this time will disappear after delivery. However, abnormal metabolism, skin exposure to strong ultraviolet rays, mental stress and other reasons will deepen the spots. Sometimes new spots will not disappear after delivery, so you need to pay more attention. 》》》》》》》》》》》》》》》》》》》》》》》》》》 Constipation can form spots, which is actually caused by allergies caused by endocrine disorders. When the body state is abnormal, ultraviolet rays will also accelerate the formation of spots. Through the above introduction, I believe everyone has a further understanding and understanding of how to grow spots on the face of a 30-year-old woman. Experts remind beauty seekers that there are many reasons for long spots. In order to effectively and thoroughly remove spots, the root of treatment lies in paying attention to the cause. Finally, experts from Zhanjiang Huamei Medical Beauty Hospital warmly remind the beauty lovers that in order to avoid risks and regrets, you must choose a formal plastic surgery institution for freckle removal! Zhanjiang Huamei has rich clinical experience in beauty, exquisite technology and professional personalized beauty solutions, so that you never have to worry about your beautiful transformation. Zhanjiang Huamei has a first-class team of experts and a number of international leading beauty instruments to provide double insurance for your beauty. For more details, please click to consult Zhanjiang Huamei online experts.