A friend of mine told me that right after she eats she gets really sick and her stomach hurts really bad. I told her that this is not s symptom of cancer but she doesn't believe me. (I think is bulimia but certainly not cancer). could you guys tell me what are the first symptoms of cancer?

she needs to see a doctor

None… most of the time you won't feel anything different. Tell your friend to see a doctor because only regular check ups can help spot cancer while it's still in its early stages.

There really is no first Symptom of cancer … usually when you start showing signs, then its to late. if your friend is really concerened about this, she needs to seek out professional medical advice and have the necessary tests performed. that is the only POSITIVE way to determine if a peson has cancer, and the best way to find out what the real problem is.

It depends on which type of cancer someone has someone with stomach cancer can definately feel sick after eating that is not uncommon at all. Weight loss is a symptom Pain in some cases where the cancer is growing, its really hard to tell you for sure since I dont know what kind of cancer you are speaking of.

she most likely as gastritis or gall stones. she should see an md

She definitely needs to see a doctor.
It may not be cancer, but it is something serious that needs to be addressed.

Your friend needs to see a doctor. Also, have her pay close attention to what she is eating. Her stomach upset could be something major or it could be a food allergy.