In 1998, the FDA approved the use of the term by some manufacturers of hair removal lasers and pulsed light devices. Permanent hair removal does not mean removing all hair from the treated area. A long-term and steady reduction in the number of hairs that regrow after the treatment regimen.

Once you understand the anatomy and growth stages of hair, what is laser therapy and how does it work?

Lasers designed for permanent hair removal emit wavelengths of light that are absorbed by the melanin in the hair follicle (dermal papilla, stromal cells, melanocytes). If the surrounding skin is lighter in color than the hair, more of the laser energy is focused on the hair shaft (selective photo thermolysis), effectively destroying the hair shaft without affecting the skin. Once the hair follicles are destroyed, the hair will gradually fall out, and the remaining hair will enter the growth phase, but because there are not enough nutrients to support healthy hair growth, the hair becomes very thin and limp.

Which technique is best for hair removal?

Traditional chemical hair removal, mechanical hair removal, or hair removal with tweezers cut off the hair at the epidermis to make the skin look smooth, but it has no effect on the hair follicles, so the hair grows very quickly, and due to irritation, the hair is less than Before much stronger hair enters the growth phase. What's more, these traditional methods may cause problems such as skin injury, bleeding, and skin sensitivity. You may ask that IPL and laser use the same treatment principle, why choose laser?

What is the difference between laser and IPL?

IPL stands for "Intense Pulsed Light" and there are branded variants such as SIPL, VPL, SPL, OPT, and SHR which are essentially the same technology. An IPL machine is not a laser because it is not a single wavelength. The wavelength bandwidth generated by the IPL machine is very wide, which can reach different depths of skin tissue and be absorbed by different targets, mainly melanin, hemoglobin, and water. In this way, all surrounding tissues can be heated to achieve multifunctional effects such as hair removal and skin rejuvenation, blood vessel vein removal, and acne treatment. However, due to its powerful power and broad-spectrum light energy, the treatment with a tingling sensation and the risk of skin burns will also be higher than that of semiconductor diode lasers.

The treatment principle of OPT (Optimal Pulsed technology) IPL technology is: intense pulsed light produces a photothermal effect and photochemical effect on the skin, rearranges the collagen and elastic fibers in the deep layer of the skin, restores skin elasticity, and at the same time enhances the function of blood vessels and eliminates facial skin wrinkles. Reduce pore shrinkage; In addition, intense pulsed light can also penetrate the skin and be selectively and preferentially absorbed by pigment groups and vascular tissues; without destroying normal skin and blood coagulation, pigment groups and pigment cells are destroyed and decomposed, thereby achieving The effect of treating hyperpigmentation.

General IPL machines use the xenon lamp inside the handle to output light, and there is a sapphire or quartz crystal at the front end that touches the skin, which transmits light energy and cools and protects the skin.

(Each beam is a single output containing many pulses), xenon lamp (German quality about 500000 pulses) lifetime will be many times less than the laser bar of a diode laser

(macrochannel or microchannel generally from 2 to 20 million) type. Therefore hair removal lasers (i.e. Alexandrite, Diode, and ND: Yag types) tend to have a longer lifespan and a more comfortable feeling of unwanted hair treatment. These lasers are exclusively used in professional hair removal centers.