I took Accutane and began losing hair in my fifth and final month of treatment. I lost about 30% of my hair. My doctor has emphasized to me that I have telogen effluvium and that my hair will grow back if given time. However, I am skeptical. It’s been 6 months since I lost the hair. And I am a 23-year-old male with some history of MPB in my family.
Interestingly, I stopped shedding 3 months ago. My question is: is it a bad sign that I stopped shedding but haven’t grown any hair back yet? And do you really believe Accutane causes a “pure” telogen effluvium, or are there any other mechanisms at work?
An answer to these questions would be appreciated. Thank you.
If it is pure telogen effluvium your hair should start to grow back after about about 6 months. In rare instances it may take longer. With some family history of MPB and if you also suspect some degree of MPB, you may consider a miniaturization study to see if there is a pattern to your hair loss.
With respect to Accutane, it may cause hair loss as a side effect, but there is no mechanism of why hair loss occurs. I have unfortunately seen people with Accutane hair loss that has not returned. Only time will tell.



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.