Photo Credit TongRo Images/TongRo Images/Getty Images. You may want to trade your after-dinner coffee for tea, especially if you sometimes have digestive issues. Both green tea and many herbal teas may help improve your digestion and limit any adverse digestive effects, such as gas and upset stomach. Check with your doctor before making herbal tea a regular part of your diet, however, as some types of herbal tea can interact with medications or cause other problems.