What is laser hair removal
Laser hair removal is based on the theory of selective photothermal action. By reasonably adjusting the laser wavelength, energy, and pulse width, the laser can pass through the skin surface and reach the root of the hair follicle. The light energy is absorbed and converted into heat energy that destroys the hair follicle tissue and destroys the hair follicle. Hair follicles and hair papillae lose the ability to regenerate hair.
Is laser hair removal safe?
1) Laser hair removal is a very safe hair removal method. It is highly professional and has no side effects on the human body. It can effectively remove hair from any part of the body, at any depth, and of different colors and textures, truly achieving “permanent hair removal.”
2) The effect is remarkable, there are no blind spots in hair removal, and any tiny fuzz can be removed.
3) Intelligent cooling technology makes the hair removal process cool and comfortable, and can effectively protect normal skin from heat damage. It is safe, painless, scar-free, and has few side effects.
Will laser hair removal be effective in one treatment?
The hair growth cycle is divided into three stages: growth phase, resting phase, and regression phase. The hair in the growth phase has the most melanin. Melanin is the target organ of laser treatment and is the most sensitive to laser treatment. Therefore, laser treatment is mainly aimed at the hair in the growth phase, and the effect on the hair in the resting phase and regression phase is not good. The hair in the growth phase accounts for 1/5-1/3, so laser hair removal is a process and cannot be solved in one treatment.
The treatment requires 3 to 6 times, an average of 4 times, and a maximum of 8 times, before the hair can be completely removed.
Does hair removal affect sweating?
Sweat mainly depends on the small sweat glands, and the opening of the small sweat glands is not in the hair follicles. At the same time, laser hair removal only destroys the hair follicles and does not harm the sweat glands, so it does not affect the body’s metabolism and sweating.
Can laser hair removal achieve permanent hair removal?
The current laser or strong light therapy device has the function of permanent hair removal, so many people will misunderstand that they will not grow hair for life after treatment. In fact, this permanence is not truly permanent.
Generally speaking, the hair removal rate can reach 90% after multiple laser or strong light treatments. Of course, its efficacy is affected by many factors. Even if there is hair regeneration, it is very thin and soft and does not affect the appearance.
Does laser hair removal harm the skin?
The human skin is a relatively transparent structure. Plastic surgery experts have found in clinical experiments that in the face of powerful lasers, the skin is simply a transparent cellophane, so the laser can penetrate the skin very smoothly and reach the hair follicles. Since the hair follicles have a lot of melanin, they can preferentially absorb a large amount of laser energy and eventually convert it into heat energy, which increases the temperature of the hair follicles and achieves the purpose of destroying the function of the hair follicles.
In this process, since the skin relatively does not absorb laser energy, or absorbs very little laser energy, the skin itself will not be damaged.
Will the hair become darker and darker after being removed?
The remaining hair after laser or strong light treatment will become thinner and lighter in color. However, for people who use shaving, plucking, hair removal cream, wax paper, etc. for a long time, the hair will gradually become thicker, harder and darker.
What are the precautions for laser hair removal?
- Shave off all visible hair on the skin surface first
The laser is like a precise sniper, using a special bullet (wavelength) to aim at a target (melanin), while the passers-by around (other skin tissues and structures) are not affected at all.
Due to the characteristic of melanin absorbing light energy, the hair in the hair removal area needs to be shaved before the operation. Otherwise, the local skin will produce a burning sensation due to the hair on the epidermis absorbing a lot of energy, and even cause pigmentation in severe cases, which will not only increase the pain of treatment, but also affect the treatment effect due to the less absorption of light energy by the melanin in the hair follicles.
The pain of the skin after hair shaving will be greatly reduced during treatment.
- How many courses of treatment are needed
Some friends may have only undergone 2 or 3 treatments, or even only 1 treatment, and did not complete the entire course of treatment. Will this lead to hair growth instead?
The answer is: it will not cause rebound hair to increase or thicken, but the treatment effect will be covered.
Only one treatment destroys the hair follicles in the growth phase, and some of them can no longer grow terminal hair; however, due to the limited effect of one treatment, as time goes by, the hair follicles in the resting and regression phases at that time enter the growth phase. Moreover, due to the safety range of laser energy, the hair follicles in the growth phase cannot be completely destroyed during the first treatment, and the hair density will appear to be close to the original state.
Therefore, if you only have 1 or 2 treatments, you still have to start from scratch if you want to continue treatment after half a year.
- Before laser hair removal, you need to make some preparations
Avoid sunlight exposure in the hair removal area and use sunscreen for more than 2 weeks;
Clean the skin in the hair removal area, remove surface oil, and shave the hair (a razor can be used, shave close to the root of the hair, and pay attention to prevent scratches);
People who are particularly sensitive to pain can perform surface anesthesia in advance.
- Laser hair removal has slight side effects
There will be a slight tingling sensation during laser hair removal, and there may be a slight burning sensation after the operation. Mild erythema and follicular papules will appear on the local skin, which will disappear within a few hours. Some patients may experience purpura, blisters, temporary pigmentation or hypopigmentation, and most of them can recover after a few months.
In addition, because of the stinging, the painful stimulation may stimulate uterine contractions, so it is not recommended for pregnant women. Expectant mothers should wait.
The way to reduce the occurrence of side effects is to do a good job of sun protection before and after the operation, shave the epidermal hair before the operation, apply ice during and after the treatment, and then use skin care ointment.
After laser hair removal, be sure to use sunscreen before outdoor activities.
In addition, a few people are sensitive to laser stimulation. To avoid side effects, you can first do a trial treatment of a few spots locally, and then treat a large area after confirming that there is no problem.