It is normal to have a cold and cough with bitterness in the mouth. However, it cannot be excluded that it is caused by gallbladder dysfunction, or gallbladder disease. There are also people with inflammation of the esophagus, which may also cause bile reflux and cause bitterness in the mouth. Usually snoring in sleep can also cause it, so it is recommended to go to the hospital for a detailed examination to clarify the cause before treatment. If there is no problem in the examination and it is caused by cold, you should avoid eating foods such as duck, pork and mutton. Drinking chicken soup can suppress throat and respiratory tract inflammation and is extremely effective in eliminating symptoms such as stuffy and runny nose, cough and sore throat caused by colds. Because chicken contains a variety of essential amino acids, it is rich in nutrition and can significantly enhance the body’s resistance to cold and flu viruses. Drink more water, eat more fruits and vegetables, and avoid spicy and stimulating foods.