I am a 30 year old male having mild stomach pain,white foam in stool and frequent flatulence (15-20 times) for 2 weeks. i hear stomach sounds regularly. stool colour is dark yellow or dark brown. some days i have diarrhoea. should i be concerned

Depends: If you have lost weight,it would be on concern and you should see a GI doctor. Otherwise, try reducing your intake of food. Your symptoms may in part be from overeating. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Wish you good health!