What Causes Frequent Bowels With Abdomen Pain?

Hello Sir, My mother is 58 years old she had operated in 1996 and she has no Utrus now since than she has problem of motion she always goes motion in 3-4 times a day. But since two months back she is more suffering of this problem and goes motion 5-6 times in a day and 2-3 times in the evening and feel some pain in stomach and feeling ballon type bally. Even after drinking water she has to go for motion. Sometimes motion is normal but sometimes its become like water. we have tried for Patanzali medicines (Baba Ramdev) but no relief found. what to do. Sonia Daughter