Hi. Thanks for your query. Just a gas ! this can not be a lone problem, we have to find and treat the reasons::: The commonest causes of bloating at the age of 51 are as follows: Aerophagia- commonest reason is anxiety and stress you have a classical history of bloating developing in the evening with hardness. The pressure in the intestines and a wish to pass it out may be due to the presence of gas itself. Other reasons can be some specific foods and beverages that are gas producing and now-not-so suitable for you. Please find a correlation and stop such foods. Another is - Intestinal infection with gas producing bacteria. I would advise you to have the following: Take a course of an antibiotic, metronidazole, probiotic , activated charcoal tablets and multivitamins; Reduce anxiety or take medicines for it if needed; stop foods causing such problems If there is full response, nothing to worry. If no relief: Investigations: *Routine blood investigations like Complete blood picture, blood sugar, urea, creatinine, liver function tests, thyroid function tests. *Urine -routine and microscopy *Stool: routine, microscopy, occult blood, culture and sensitivity. *Ultrasonography of abdomen, *Colonoscopy All these investigations should be within normal limits for one to say you have IBS.