Thankyou for the Question,
There can be many causes of
abdominal pain.As your mother is 55 so i would tell common factors which can cause pain in abdomen in this age.
1.She must be in menopause stage so mood swings can be factor with anxiety.
2.If she gets pain before having food it can be because of gastric ulcer.
3.If she gets pain after having food it can be because of
peptic ulcer.
4.It also depends what kind of pain is this? like wether it is cruciating,burning,or heaviness .
5.Some waterborne and food borne infections can cause abdominal pain too.
6.Is abdominal pain is associted with bleeding per vaginum
7.Stone in
gallbladder can cause abdominal pain .
To rule out the cause there are some investigations which can be followed.e.g..
Stool test,
ultrasound of abdomen,Endoscopy,Xray-abdomen .
And can further discuss with the doctor..
hope my answer is helpfull for you.
regards,
Dr.Maheshwari