There are many reasons for bitter mouth and tastelessness during pregnancy, which may be a normal physiological phenomenon, or it may be tooth decay as well as indigestion, etc. It is necessary to determine the cause according to the actual situation and seek medical examination and treatment if necessary. First, physiological reasons: 1, hormonal changes: due to changes in the levels of estrogen and progesterone in the body during pregnancy, resulting in changes in the sense of taste of pregnant women, bitter mouth, tasteless. In addition, pregnant women may also appear nausea, vomiting, loss of appetite, fatigue and other common symptoms of pregnancy, is a normal phenomenon, do not worry; 2, zinc deficiency: abnormal taste during pregnancy may also be related to the lack of zinc in the body of the pregnant woman, you can try to supplement the appropriate zinc-rich foods such as beef, pork and mutton, eggs and fish may help to alleviate the; 3, dietary improprieties: due to consumption of moldy or expired food, or Eating too much spicy, stimulating food, also prone to bitter, tasteless mouth. Second, pathological factors: 1, Western medicine perspective: some pregnant women with cavities in their teeth may also feel an abnormal taste in their mouths, such as bitter mouth, or gastrointestinal dysfunction during pregnancy, indigestion after eating and drinking, which can also cause a bitter mouth and tastelessness; 2, Traditional Chinese Medicine (TCM) perspective: a bitter mouth and tastelessness can be seen as a result of the liver and gallbladder stagnation and heat, and bile overflowing; in addition to a bitter mouth, there can be heartburn, a dry mouth, irritability, headache, coercive and rib distension and pain, Yellow urine and other symptoms. At this time, you can go to the Chinese medicine department for treatment to ease the liver and gallbladder and clear the heat.