After laser hair removal, hairs do not fall out immediately due to several factors related to hair growth cycles, the laser’s effects, and individual variations. Here are the main reasons for the delay:
Phases of Hair Growth
Hair grows in different phases, and the laser treatment’s effectiveness depends on these phases:
Anagen (Active Growth Phase): Laser hair removal is most effective during this phase when the hair is actively growing, and melanin (the pigment in the hair) absorbs the laser energy.
Catagen (Transition Phase): The hair follicle begins to shrink, and the laser is less effective.
Telogen (Resting Phase): The hair is at rest and not growing, making it the least responsive to laser treatment.
Since the laser targets hair in the anagen phase, hairs in the catagen and telogen phases might not absorb the laser energy effectively, delaying the fall out.
Hair Shedding Time
After the laser treatment, the damaged hair follicles gradually push the hair out. This process can take from a few days to several weeks. During this period, the hairs may seem to grow, but they are actually being expelled from the follicle.
Laser Intensity and Settings
The effectiveness of the treatment also depends on the laser settings:
Wavelength: Different wavelengths penetrate the skin to various depths.
Energy Level: The amount of energy delivered to the hair follicle.
Pulse Duration: The length of time the laser pulse is applied.
Incorrect settings can result in a less effective treatment, leading to delayed hair loss.
Skin and Hair Type
The color and type of skin and hair significantly affect laser hair removal:
Darker Hair and Lighter Skin: The contrast allows for easier absorption of the laser energy, making the treatment more effective.
Lighter Hair or Darker Skin: These conditions might require more sessions, and the hair may take longer to fall out due to less effective absorption of the laser energy.
Aftercare
Proper aftercare is crucial for optimal results:
Avoid Sun Exposure: Protecting the treated area from the sun helps prevent skin irritation and promotes healing.
Gentle Skin Care: Using mild skincare products and avoiding harsh treatments can help the treated area heal better.
Avoid Rubbing the Area: Reduces the risk of irritation and helps the hair fall out naturally.
The delay in hair falling out after laser hair removal is due to the normal shedding process, the growth phase of the hair, the laser settings, and individual skin and hair characteristics. If hairs do not fall out promptly, it is usually part of the normal process, but consulting with your specialist can provide specific information and recommendations based on your situation.
