I'm a 35 yo female, 5'1, 128lb. i've gained 10lb in the last 6mo with abdominal bloating and gas. no change in diet. what could have caused this?

Diet and Thyroid: Gas and bloating has many causes1excessive swallowed air2 certain foods like carbonated beverages, spicy fried or fatty foods, broccoli, cabbage, onions, beans, apple or prune juice, fried food , sorbitol, manitol, in many low carb/sugar free foods.Certain behaviors like talking while chewing, chewing gum, . .Medical causes lactose intolerance . Check thyroid for weight gain/consult a nutritionist for diet.