When you start to throw up because you haven't eatin what does that mean?

If you are doing it on purpose, it could be a symptom of bulimia, an eating disorder. Bulimia is similar to anorexia, and is most common in teen girls (although it can affect any gender or age). It is something that you would need to seek both physical and mental help for. It usually has psychological roots, and sometimes, you aren't even sure why you do it. It's more common that you would think, and it is brave to ask for help.

If it is just something that is happening all by itself, you probably have a condition. If you have really bad reflux, it could cause food to come back up. There are treatments available for this, and it doesn't have to go on forever. Some other possibilities are rumination syndrome, achalasia, and dysphagia. All of these are problems that can cause food to pop back up.

There could also be much more serious issues such as cancer. However, usually the simplest answer is usually the right answer.

Your best bet is to go talk to your doctor. Even if it doesn't burn, it is introducing extra acids into your throat and mouth. It could be a problem for your tooth enamel. Your doctor should be able to narrow down the problem, and even do some swallow studies. In all likelihood, it is a simple fix, and you won't have to keep dealing with this happening.