Hi. Thanks for your query. Noted the history and understood the concerns. Few months of suffering from gas problem and also itching in the anal area is definitely suggestive of an intestinal infection. Hence I would suggest you the following: Stool sample for three consecutive days should be done. Also check blood for CBC, sugar, thyroid functions. If there is an evidence of infection a course of an antibiotic active against bowel infection , metronidazole should solve your problems. Also take a probiotic. Identify the foods and beverages that instigate or enhance your problems and stop them altogether. Take yogurt, bananas, activated charcoal for better results. These will control intestinal infection and hence the itching at the anal region. Do not apply steroid creams like Betnovate as it can cause thinning of the skin.