Why is the skin of the wound always deeper? In the past, some people thought that the wound skin was darker because it was dyed with excellent iodine after disinfection, but in fact, excellent iodine did not cause pigmentation, but "melanin deposition" did cause the wound to be darker.
Melanin is actually a skin protection mechanism, so in addition to being deposited under ultraviolet rays, as long as the skin is exposed to * * *, it will awaken melanocytes hidden in the dermis and produce a large amount of melanin deposited on the epidermis; Such as inflammation, friction, drug action and endocrine. , is a kind of * * *, which is why our elbows and knees are darker, because they are more vulnerable to friction.
Generally, small wounds are relatively small, so the skin color of the wound will not be too bad, but if you scratch it because of itching in the scabbing stage, it will make the skin get * * * again and the color will get darker and darker; And big wounds, or surgical wounds, are directly melanocytes because they are cut below the dermis, so the number of precipitates will be more and the color will be deeper. During the healing period, melanin will continue to precipitate if it is often rubbed by walking or clothes.
For example, after replacing the artificial knee joint on one side, because the knee is often active, the surgical wound is larger and the melanin precipitation will be more serious, which makes the knees on both sides look different in color. However, as long as the wound is not purulent, festering, smelly, scarred and darkened, it is normal.
What can I do to make melanin less? But melanocytes also have metabolism, generally speaking, the cycle is 28 days, so it takes at least 1 month for melanin to slowly subside, which means that there is still no * * * behavior in this 1 month. If the skin continues to * * *, melanin will still be deposited.
Methods of preventing melanin deposition in wounds
First of all, you must protect yourself from the sun. Reduce friction, such as knee wounds, try not to wear knee-length skirts or jeans, and wear loose clothes; If it is easy to move, you can stick a layer of silicone film to keep the skin from tearing. Never scratch the wound. If you feel itchy, you can ice it with a wet towel. After the wound is healed, the wound can be pressed to reduce tissue proliferation and melanin deposition. After the wound is healed, it can moisturize, because the cuticle of the skin has sufficient water content and smooth surface, and the melanin deposition looks less obvious, which can also accelerate the metabolism of melanin. Don't use external whitening products casually, because if you don't understand the skin condition, it may lead to greater * * *. In addition, it is easy to be overlooked that eating too much photosensitive food will make the skin more sensitive. Li Youzhuan, director of the dermatology department of Wan Fang Hospital, said that celery, carrots, parsley, pineapple and lemon may all cause some skin "photosensitivity" and pigmentation, but this kind of reddish, rough and desquamation gray plaque is solar keratosis, which belongs to precancerous lesions of squamous cell carcinoma and cannot be simply treated as black skin.
If all the above can be done, the melanin deposition will slowly slow down and the wound will look like other skin colors, but it can't be exactly the same. After all, other skin has been used for a while, and the new skin is relatively new, and the tissue composition will be a little different. If you really care, you can find a plastic surgeon with a formal license for treatment.