Hi...
This is Dr.Harsha,consultant Gastrointestinal and Minimal access Surgeon from Bangalore,
I see that you are having two different problems the first is your stomach bloating and the second one is itching around the anus.
The stomach bloating could be due to to excessive gas accumulation when you have your meals in a hurry, less commonly it might also be due to the failure of the lower esophageal sphincter to relax to let out in the air from the stomach..
The itching around the anus could be a sign of of parasitic infestation...
Next Steps
I need to ask you a few more questions to be sure regarding the diagnosis before I can prescribe you the medications. please contact me once so that I can get to know the diagnosis better in order to prescribe your medications