What happens if I stop laser hair removal after 1 session?

Thank you for your question in regards to laser hair removal. After one laser hair removal treatment, you wont see much of an improvement. A series of six sessions are usually recommended to achieve desired results. To be sure what is best for you, see two or more board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps!

If you stop laser hair removal after one treatment, the hair will regrow. It will likely be less dense than before. How much less dense it will be depends on the area treated and the effectiveness of the laser. There is no need to worry about a rebound effect. 
I hope this puts your mind at ease.

Since only active hair follicles are affected, only a fraction of the total hair follicles are destroyed during any one treatment.  Usually 5-8 treatments are necessary to achieve the desired result.  You will probably notice only minimal hair reduction after one treatment and it is very unlikely that overgrowth will occur.

Hello, Thank you for your question.  1 single treatment with laser will probably not effect the area much at all.  There is only about 20% of your total hair follicles in the growth cycle at any one time, therefore with one treatment, only about 20% at best, of the follicles in the area were effected.  It should not grow back spotty or patchy, may take a while to completely regrow, but reduction should have been minimal.

If you are not comfortable moving forward with your laser hair removal treatments, you can stop at any time.  Any follicles that were destroyed with your first treatment are gone but there are others that will become active over time.  You may see some thinner areas, but it should not be severe.  Of course, everybody reacts a little differently.  Regards, Dr. DiPasquale

It is upsetting to hear that you want to stop laser hair reduction treatment.  An experienced provider should be able to make your visits comfortable.  
It takes at least three sessions to start seeing significant improvement.  One session may improve the way treated area looks.  
Stopping laser hair reduction treatment after one session will not cause overgrowth.  So, not to worry.  
Dr. O. Vinson