Step 1: Sit in a chair and slowly lift your legs.
Step 2: Put your hands gently on the lower abdomen, exhale slowly, and gradually tighten the lower abdomen while exhaling.
Step 3: Breathe out slowly, tighten your lower abdomen and keep your shoulders relaxed.
Step 4: When the abdomen has received the tightest degree, the gas will be spit out at the same time.
Step 5: After the shoulders and abdomen are relaxed, slowly start inhaling.
Step 6: Inhale as much as possible. At this point, the lower abdomen does not need to be deliberately contracted, but is pressed down by the abdomen.
In addition, we should control our diet and eat less big fish and meat.