This is disordered in itself, please stop now. It can become very addictive. You should really see a medical profressional about this.
If you don't, it could prgoress into an eating disorder like bulimia [something I have]. It takes a great toll on your health, mentality, relationships, school, work and life.
To fit the criteria of being a bulimic, you need to binge and purge [one or more of the following: throw up, abuse laxatives or diuretics, excessively excercise, fast, or restrict] twice a week for three months.

I agree with Sarah you need to seek some medical advice and start to consider if you need counselling to resolve the causes of your ed.
Even when not diagnosed the actions you describe can progress to cause serious physical and emotional harm.
You need to look for what is causing you to do this.

well it isnt good... right? you must know this isnt good...

and it will not help you lose weight...

please try to stop...

I would suggest seeing your primary doctor and going to a therapist and a nutritionist. Bulimia is a viscious cycle and if you are catching it now... GO TO THE DOCTOR!!!!

Ok, Hope. please STOP throwng up. If you don't it can take over your life like it has mine. I've been doing it off and on for 34 years and now I cannot stop. It has ruined my life. I think I would have rather been overweight like most everyone else my age in TN. I feel like a failure as a wife, a mother and a friend. It may be like cocaine and one time makes a person an addict. But seek help now before it becomes a habit that is engrained in your psyche. If you can't do it for yourself, do it in my my memory because it is sure to kill me early.

Get help to stop it now... it might seem like a good idea now but in a 'while' you will be addicted and it will have taken over your life and TRUST ME it will be the worst decision you have ever made to start it in the first place.

Why are you purging? Is it really about the weight? Or is about how you are feeling underneath it all? Do you think that purging to try and lose weight (it rarely happens) will somehow resolve any past issues, trauma, and self-esteem problems?

I will tell you what it will do: It will ruin any chance at a social life, make it impossible to have any energy and leave you exhausted, destroy your body (teeth decay, gum recession, ulcers, pancreatitis, electrolyte imbalances leading to seizures/stroke/heart attack and ultimately DEATH), and in the end, you will be no closer to feeling better about yourself.

Please listen to the words said in my post, and in everyone else's posts, and see a therapist NOW. Don't allow this to go on for another week, month, year, and beyond. It can and WILL kill you.