1. Endocrine disorder: During menstruation or pregnancy, the hormone level in the body will change, thus affecting the production of melanin, which is also one of the main reasons for pigmentation.
2. Decreased metabolism: With the increase of age, incorrect skin care methods and bad living habits, the body function will gradually decline and the metabolic capacity will also decline. Decreased metabolism will affect the discharge of melanin, which is easy to cause pigmentation.
3. Ultraviolet radiation: Ultraviolet radiation is an important cause of pigmentation. When ultraviolet rays irradiate the skin, it will stimulate melanocytes in the skin to produce a lot of melanin, which will lead to skin blackening and spots.
4. Improper use of skin care products: If you choose irregular skin care products or wrong skin care methods, you will not only be unable to maintain your skin, but also lead to skin problems such as long spots and dullness.
The above is just one of the possible reasons. If you are worried that using Watson's 360 hydrating sleep mask will cause long spots, it is recommended to stop using it and consult a professional doctor.