According to your description, the above symptoms are caused by stomach fire, which refers to the pathological changes of stomach heat, such as swollen gums, bad breath, noisy hunger and constipation. You can eat Niuhuang Wei Qing Pills and soybean oligosaccharides for conditioning, drink more tea, eat more fresh fruits and vegetables, especially foods containing more cellulose, such as oats, buckwheat, corn flour, etc., and don't eat spicy and irritating foods.