Hello!
I have been using a laser comb for about 6 months, and it has grown more hair than anything I have tried in the last 25 years. (I am 54). It’s not a lot of hair, but it’s clearly new hair growth. Your article on Lasers is very good, but I notice it was dated 2005. Will you be updating the article soon? thank you!!
Our understanding of the role of lasers in hair growth and hair restoration has not been changed much in the last two years. There has not been sophisticated research published in a peer reviewed journal on the effect of this particular type of laser on hair growth as of yet. When and if such information ever becomes available, I would love to post about it on this site.
In general, any burn or local scalp irritation can cause hair loss. Chemicals can work their way down the hair shaft to get at the growth centers which lies at the bulb (5-6 mm deep) or at the bulge (about 2-3 mm from the skin surface). For heat burns, you should have a second or third degree burn to the skin and see it quickly, but for chemicals burns, it might take weeks for the full damage to be known. If the chemical burn causes complete loss of the hair growing centers, then the hair will fall out in 7-14 days, but if there is partial damage to just part of the growing follicle, this may take more than a month to understand the damage. Varying insults may force hair follicles to go into their resting phase (telogen) and after 2-6 months, it may go into its growth phase (anagen). In your situation, hair loss may be seen as early as a few days after the injury or it may also take weeks to see the full impact.
