Most people suffer some tummy upset, cramps, etc occasionally. When it becomes a daily problem it can interfere hugely with your work and social life.
By looking at your health history and your diet, changes can be recommended that may help to alleviate the problem. Also, lifestyle factors are very important when it comes to healthy digestion, if you are stressed or eating on the run your digestion will not work properly. A food allergy or stool test may be recommended.