I have a client feedback he has abnormal hair growth after laser hair removal treatment. This is not common. I showed several articles to explain the possible mechanism of this phenomenon:
• Comparative study on shaving and hair cutting before laser hair removal The article did not specifically mention the specific mechanism of abnormal hirsutism, but mainly focused on comparing the effects of two different hair shortening methods (razor and scissors) on the efficacy of laser hair removal. The article mentioned that there were cases of abnormal hirsutism in the razor group, which may suggest that shaving may be more likely to trigger abnormal reactions of hair follicles than hair cutting.
• Hair growth induced by weifang huamei diode laser treatment The mechanism mentioned in the article involves the local inflammatory response that may be caused by laser hair removal. Inflammation may activate the surrounding hair follicles, leading to changes in the hair growth cycle, which may promote hair growth rather than reduce it. Although the specific biological mechanism has not been explained in detail, this shows that laser hair removal may induce a more active hair follicle response.
• Paradoxical hirsutism after laser hair removal This article discusses possible mechanisms of paradoxical hirsutism, including that lasers may fail to completely destroy hair follicles but only activate them. This may cause follicles to shift from the resting phase to the growth phase, especially after treatment with lower-energy lasers. In addition, paradoxical hirsutism may be related to changes in local or systemic hormone levels caused by laser exposure, especially in the area of skin treated with lasers.
• Paradoxical hirsutism after laser hair removal This article also points out that low-energy laser parameter treatment may promote rather than inhibit the activity of hair follicles, especially when the skin type is darker or when lower energy settings are used. The thermal effect caused by the laser may stimulate the follicles to enter the growth phase without completely destroying them.
1. I think the so-called "paradoxical hirsutism" may not be accurate. In many cases, what we see is just the regrowth of hair follicles that were not completely destroyed after laser or intense pulsed light (IPL) treatment. If the energy applied to the hair follicles is too low, these follicles are likely to survive. Such follicles will quickly enter the catagen phase and then the resting phase - regardless of which stage of the growth phase they were in before. These follicles will then enter a new growth phase. At the same time, those follicles that were supposed to be in the growth phase will also begin to grow. The result is that the amount of hair follicle growth may be greater than would normally be expected. There is some evidence that repeated, sub-threshold treatments may even cause hair growth to synchronize. Many follicles will begin to grow at the same time, whereas normally this growth is more random. This can happen even when the correct energy is applied.
2. Even with high energy, not all follicles are destroyed. Because some follicles are located too deep to be completely destroyed. These stimulated follicles will begin to grow again earlier than normal, and the hair is usually thinner and lighter in color. Therefore, even after a "successful" treatment, it looks like more hair has grown than normal.
Key points for hair removal treatment: 1. Cool down before and after. 2. Choose higher energy. 3. change treatment time.
Hair removal treatment is a very simple project that can be started in a few minutes of training, but there are many profound theoretical foundations behind it, which involve the anatomical structure of hair follicles, knowledge about stem cells, hair follicle cycles, the working principle of lasers, etc., welcome to talk with Anna if any interest in this.
If any further info about weifang huamei laser hair removal machines, no matter it's diode laser hair removal machine, or Alexandrite solid laser equipment, please feel free to reach us anytime by WhatsApp: +86 187 65787025
