So its been 4 weeks since my first laser session on face for hair removal.the regrowth of hairs has started on patches.what is the best timing for my next laser session.the laser place where i go is cheap and the technician doesnt know much about that she told to come after 5 weeks

I wouldn't go back at all. If the laser tech doesn't know you are at risk of having your face scarred, it isn't worth the 'cheap' price to be disfigured or wasting money on someone not knowing what they are doing.

The hair growth cycle of human facial hair is in a 6 week (approx) cycle.

I did noticed falling of hairs so i guess that  i will go after 6 weeks not before that

My laser treatment for face is once every 4 weeks, and body is once every 6 weeks. No scarring has occured and the techs seem to know what they're doing.

Quote from: Cindy on November 05, 2017, 10:31:27 PM
I wouldn't go back at all. If the laser tech doesn't know you are at risk of having your face scarred, it isn't worth the 'cheap' price to be disfigured or wasting money on someone not knowing what they are doing.

The hair growth cycle of human facial hair is in a 6 week (approx) cycle.

Just to show how odd the world is. Hair Growth Cycles in the Sprague Dawley Rat was my first research paper some years ago. I think it was around 'more years than you lot were born' or about then  . I was a minor author in a minor paper and put on for courtesy as I was the student in the lab who made the tea and coffee for the rats.

Hi, Cindy

This sounds intriguing. Assuming an average monthly growth rate of around 12 mm, and given that some men can grow quite long beards I assume that the six week cycle you mention probably doesn't refer to the anagen-catagen-telogen cycle.

Do you mind elaborating a bit, if it's not too much trouble?

Quote from: zirconia on November 06, 2017, 06:13:53 AM
Hi, Cindy

This sounds intriguing. Assuming an average monthly growth rate of around 12 mm, and given that some men can grow quite long beards I assume that the six week cycle you mention probably doesn't refer to the anagen-catagen-telogen cycle.

Do you mind elaborating a bit, if it's not too much trouble?

I am afraid that this is stretching my old brain to work on thoughts from some 45 years ago.

We were interested in hair growth cycles as in pattern of hair growth, at the time I think anagen was recognised and a dormancy that we would now call telogen (I think but I am not up on the terminology). What we were interested in was how cycles of growth occurred.
Now what we worked on (royal we) was that although the majority of hair was growing at a particular time, a fact that we could demonstrate by plucking hairs from different parts of the animals body and measuring the length on a daily basis. Not all parts of the body grew hair at the same time. Hair growth occurs in set patterns or waves.

Hence if you take your rat and carefully shampoo and shave it to a bald skin and then start to measure hair growth on a daily basis, again by plucking random hairs at set body areas, the hair growth is not uniform but occurs in a 'wave'. This was from memory quite set in the pattern.

How does this fit in our modern 'hipster'? Well a persons beard will not grow uniformly but you will not detect the difference unless you measure hair growth along the beard on a set time basis. However if you clean shave a face and watch how hair grows you will find a wave effect as some follicles become active and start to grow, followed in time by another set of follicles. As far as laser goes you will hit the activated growing follicle but of course have no effect on the resting. Waiting for the wave to catch up is required to hit the next series of follicles to become active.This wave in humans is around the 5-6 week mark on the face.
I think in humans the wave on the face is from the sideburns towards the cheeks, the snout is independent.

I remember the wave bit but the rest is lost in time I sort of remember that we were interested in one of the steroid hormones being involved but I can't remember which. Shortly after I moved into the equally fascinating area of cortisol secretion in eels as they adapt to salt water from fresh. Eventually I some how ended up in cancer research and diagnostics.

If I recall and how could I forget, my role in this study was that of a hair measurer. So I would collect hairs by plucking rats on a set pattern, sticking the hairs onto sticky tape and measuring their length.

Quote from: Cindy on November 06, 2017, 07:09:32 AM
....., my role in this study was that of a hair measurer. So I would collect hairs by plucking rats on a set pattern, sticking the hairs onto sticky tape and measuring their length.

So among you many and varied talents we can add Rat Hair Measurer....

Quote from: ElizabethK on November 06, 2017, 07:19:53 AM

Quote from: Cindy on November 06, 2017, 07:09:32 AM
....., my role in this study was that of a hair measurer. So I would collect hairs by plucking rats on a set pattern, sticking the hairs onto sticky tape and measuring their length.

So among you many and varied talents we can add Rat Hair Measurer....

Is that better than being a rat plucker!

I think there is a song there somewhere "I was only a rat plucker's daughter etc"

Quote from: Cindy on November 06, 2017, 07:26:46 AM
So among you many and varied talents we can add Rat Hair Measurer....
Is that better than being a rat plucker!

Give yourself some credit Cindy.  You sound like your a professional rat hair stylist

Hi Cindy

Thank you!

Quote from: Cindy on November 06, 2017, 07:09:32 AMWe were interested in hair growth cycles as in pattern of hair growth, at the time I think anagen was recognised and a dormancy that we would now call telogen (I think but I am not up on the terminology). What we were interested in was how cycles of growth occurred.

Yes—the current terms are anagen, catagen (during which the follicle stops producing pigment and shuts down) and telogen (during which the follicle is dormant but the hair may remain anchored, albeit less firmly, until the beginning of the next anagen phase.

(snip)

Quote from: Cindy on November 06, 2017, 07:09:32 AMHow does this fit in our modern 'hipster'? Well a persons beard will not grow uniformly but you will not detect the difference unless you measure hair growth along the beard on a set time basis. However if you clean shave a face and watch how hair grows you will find a wave effect as some follicles become active and start to grow, followed in time by another set of follicles. As far as laser goes you will hit the activated growing follicle but of course have no effect on the resting. Waiting for the wave to catch up is required to hit the next series of follicles to become active.This wave in humans is around the 5-6 week mark on the face.

OK—this actually somewhat correlates with what I've read. Actually the doctor whose studies I found most interesting concluded that an efficient way to minimize skin trauma when treating a beard using laser was to on the first appointment use a low enough fluence to not kill the hairs but just make most shed. He'd time the second appointment about three weeks later—at which point the shedding would be complete—and the now lower density would allow him to increase the fluence to a level that would have caused burns at the original hair density. The treatment intervals (and fluence) would then be incrementally increased as the total density decreased to allow more hairs to be caught at the anlagen stage and be killed.

(edit to add the correlation point which I forgot to write yesterday)

After about four sessions, subsequent treatments were timed at about six to eight weeks apart. If the new growth wave interval is five to six weeks this pretty much matches it with a bit of leeway.

Quote from: Cindy on November 06, 2017, 07:09:32 AMI think in humans the wave on the face is from the sideburns towards the cheeks, the snout is independent.

This really is fascinating. I didn't know that the hairs activate in waves. And the hairs around the mouth do in fact also react differently to electrolysis...

Thanks again!

As a general rule of thumb, 4 weeks on face, 6 for body. However, each laser tech has their own timeframe that they use to get results. My first laser tech said 4 weeks for the face with Alexanderite laser. My second laser tech said 8 weeks for the face with diode laser. I'm having way better results with 8 week diode than the 4 week Alexanderite. Diode hurt like Hell, but 1 session cleared 90% of my face. Alexanderite made the hairs come back slower after 1 session, but they all came back. I'm a believer in the diode for me.