Stomach issues. Plz help!

The problem is my grandmother is facing a lot of issues in her stomach since 1.5 months like whenever she eats something it feels heavy in her stomach even when she drinks water heaviness builds up in her stomach like she's not able to eat anything properly water is also we can say not getting digested in her stomach. We consulted our family doctor in this case and he said these are thé symptoms of stomach ulcers since water is also causing pain or heaviness in her abdomen area so he did all the treatment and she felt ok for 3-4 days ate food but then again things went wrong and she started to feel the same thing in her abdomen area and now we consulted another doctor and he's written medicines but she's feeling very bad still...Plz it's a request to gastroenterologists plz help