Is Ulcer 100% Curable ?

i have a friend who has had an ulcer problem about 2 years ago. shes 19 rightnow soon to turn 20 in a few weeks. she had an endoscopy as soon as the pain got worst. she was constantly vommiting. and she also had a pain around her abdominal area usually late around 3 to 4 in the morning at times. she was given pills as a treatment, but she did not keep up with taking them. i just now started helping her as a reminder to take them. i am not quite sure what kind of pills they were. but after a couple days, there was a pain again and as well was she vomiting around 3 in the morning. soon after , the next day she went to go see a doctor who specializes in ulcers, and she was told she would have another endoscopy in 2 weeks. as of now, i am really trying to help her as much as i can. we both know she has to avoid certain and acidic foods and fluids. besides that, that is as much as i know i can do to help her . she feels worried and upset because she was also told on her first endoscopy that the ulcer can lead to a cancer if she is not treated. may i please have any advice, ideas, or any sort of help to relieve her from pain. and is this 100% curable? i would really gladly appreciate any help from a doctor that can resolve this problem. i want her to live a healthy life and a very long one.