My mouth is bitter with Shu Shi Da toothpaste.

There may be the following reasons for bitter taste with Shu Shi Da toothpaste:

1. Shushida toothpaste is a toothpaste with medicine, which needs to be used when there are corresponding symptoms, such as dentin allergy.

2. If it is asymptomatic or used for a long time, it may have certain effects on teeth, because the ingredients in medicinal toothpaste have therapeutic effects on teeth and have certain side effects.

3. Shushida toothpaste contains strontium acetate and other ingredients, which has a stimulating effect on oral mucosa and may lead to bitter taste.

4. In addition, some people may be allergic to some ingredients in Shushida toothpaste, and symptoms such as bitter taste will appear after use.

Therefore, we should pay attention to the following points when using Shushida toothpaste:

1. Use according to the instructions or doctor's advice, and don't use it for a long time or without symptoms.

2. If you feel uncomfortable symptoms such as bitter taste after using Shushida toothpaste, you are advised to stop using it and consult a doctor or dentist.

3. If you have symptoms such as bitter taste, you can rinse your mouth and drink water to relieve the symptoms.

4. If symptoms such as bitter taste often appear, it may be an oral health problem. It is recommended to seek medical advice in time.