The most common cause for your symptoms at your age is due to sensitive stomach and bowel (functional dyspepsia and irritable bowel syndrome). A lot of times these are closely related to your dietary habit and lifestyle.
You can find out FODMAP from the internet and attempt to reduce the FODMAP content in your diet, this can help to improve your symptoms related to dietary intake.
Other than that, please avoid smoking, alcohol, late dinner/ supper and always take your meal on time. Not to forget also having a good sleeping habit as adequate rest and relaxation will help your symptoms too.
If you are still troubled by the symptoms after you have modified your diet and lifestyle, you can consult gastroenterologist for further assessment.
Hope this help you
Dr Loh Poh Yen
