What are the reasons for dark yellow skin and dark skin?

1. Poor rest, lack of sleep

Sleep at night is the most active time for skin cell renewal. If you sleep too late or lack of sleep, your metabolic function will no longer be smooth, which will lead to the thickening of the aged stratum corneum, resulting in dark yellow skin, loss of transparency and dim color. People who have poor sleep for a long time naturally look gray and black, and it is useless to use any whitening products.

2. Elderly type

The main problem of "aging yellow-faced woman" is the deposition of aging cells on the skin surface, so as long as these aging cells are removed, the skin can be white and translucent.

3. The cleaning is not thorough

After a period of time, foundation will be mixed with sebum and dust to form dirt, and then oxidized and deteriorated. If the face is not thoroughly cleaned, dirt will remain on the face, making the skin dull and dull.

4. ultraviolet rays

UVB will tan the skin, while UVA will penetrate and destroy the dermis, invade collagen fibers and elastic fibers, and make them deteriorate, leaving a lump in the dermis, resulting in dark yellow skin losing its transparency, turning yellow and dull.

5. Dry type

This yellow-faced woman often has some misunderstandings about whitening. They don't think it is necessary to remove oil and whiten in hot weather. In fact, whitening itself is a purification process. After melanin falls off from epidermal cells, the surface layer of skin becomes clean, which needs to be protected by water and nutrition.

6. Types of sunburn

Perhaps we have read 100 times from beauty books, but we still have to emphasize: resist ultraviolet rays and reduce the formation of black and yellow pigments! Therefore, no matter what kind of skin you want to whiten, you must do a good job of sun protection.

7. Types of smoking

The "smoke pollution" of cigarettes will make the skin produce a lot of free radicals, which will make the blood and lymph circulation not smooth, and the skin toxins cannot be effectively discharged, which will make the skin yellow and may also lead to pigmentation.

Causes of dark skin:

1. Ultraviolet rays promote melanin production.

Everyone should be familiar with the term melanin. The excessive production of melanin in skin is a big killer that makes skin difficult to whiten, and the biggest reason for the large production of melanin is ultraviolet rays.

If people with fair skin do not pay attention to sun protection, long-term exposure to ultraviolet rays will cause melanin to form on the skin, which will cause dullness and pigmentation after precipitation, and the skin color is not white. Therefore, we must do a good job of sun protection in our daily life. Whether it is cloudy or sunny, you should apply sunscreen to your skin to prevent the formation of melanin.

2. Insufficient skin moisture

Computer radiation, air conditioning and skin aging in daily life will all cause dry skin, which will lead to the decline of skin quality and dull skin.

Skin whitening and moisturizing have always been closely linked, and moist skin can present a whiter luster. However, the skin with insufficient water has poor metabolic ability, which reduces the skin repair function and causes dark skin.

3. Disorder of work and rest

Irregular living habits are not only bad for your health, but also make your skin black!

Sleep at night, the skin is in the best repair state. Only by ensuring a good sleep can the skin metabolism be smoother and the skin be whiter. Poor rest and lack of sleep not only affect health, but also slow down blood flow, shrink blood vessels, turn into spots due to congestion, and turn skin into gray-black.

Lack of sleep will affect the skin's water locking function and make the skin seriously dehydrated. At the same time, due to the inability to ensure the supply of oxygen, the skin will be malnourished, leading to local pigment accumulation, drying and blackening.

4. Like to take a bath

Some people like to rub their skin hard when taking a bath, thinking that it can be washed more cleanly. However, excessive force or repeated rubbing will lead to skin blackening, which is called "friction melanosis".

The relationship between skin blackening and improper rubbing has been confirmed by relevant experts, which is mainly caused by mechanical stimulation such as strong friction and oppression on local skin, and mostly occurs in people who rub hard with bath towels or chemical fiber rubbing towels, mainly showing light brown to dark brown pigmentation.

5. Skin stratum corneum aging

Our skin has a layer of cutin, which is like a double-edged sword. It is not only a protective film to protect our skin from external harm, but also a dull complexion caused by aging or residue of our skin.

Due to the long-term exposure of modern people to ultraviolet rays and computer screen radiation, coupled with the pollution of the external environment, the aging of the stratum corneum is accelerated, resulting in dull skin color and rough skin.

Therefore, we must do a good job of isolation and sun protection at ordinary times, and at the same time, we must supplement the skin with antioxidant components and eat more foods rich in vitamins to prevent keratin from aging too fast.

Extended data:

Methods to improve dark yellow and black skin:

1. Egg:

Applying the boiled egg white to the face will help to clean the dirt in the pores of the face and fully absorb the amino acids of protein to the skin, thus effectively absorbing albumin. An egg a day and rubbing it on the face for 10 minute for 1 month can effectively improve skin whitening and elasticity.

2. Cucumber:

Cucumber is rich in vitamin B. After cleaning the facial skin, stir the cucumber into mud, evenly spread it on the face, and then cover the face with paper film once a day for 1 month, which can effectively increase the whitening and delicacy of the skin.

Step 3 Wash your face with white vinegar:

Prepare a basin of warm water, add 2 spoonfuls of white vinegar, and then wash your face with water. Continuous use can enhance skin vitality, dilute pigmentation and effectively improve skin whitening.

Step 4 prescribe diet

Drinking more milk can whiten skin, and eating more fruits and vegetables rich in vitamin C, such as tomatoes, lemons, guava, Liu Ding, hawthorn and fresh green leafy vegetables. Foods sensitive to light, such as parsley, carrots and celery, should be eaten as little as possible.

Rest and sleep

Poor rest and lack of sleep not only affect health, but also slow down blood flow, shrink blood vessels, turn into spots due to congestion, and turn skin into gray-black. So pay attention to proper rest and adequate sleep.

References:

People's Health Network-What about yellow skin?