3, eat icing sugar, mouth inside the bitter feeling is very strong, you can eat 1-2 icing sugar to improve the bitterness, relieve the mouth bitterness; 4, eat orange, orange taste sweet and delicious, and rich in vitamins, eat more orange can use its sweetness to regulate the mouth inside the bitter taste, but also can effectively relieve the bitterness. When there is a bitter feeling in the mouth, you need to find out the cause before prescribing the right medicine.