Pregnant women with a big rotten tooth does not have a trick to stop the pain, first of all, you need to clarify the cause of toothache caused by rotten teeth, the cause of treatment. At this time is usually caused by tooth decay, you can use light salt water to rinse the mouth, ice, local treatment and other ways to relieve the pain. 1. Salt water gargling: Salt water gargling can remove food debris and bacteria in the mouth, thus reducing pain. 2. Ice compress: You can apply cold towels and ice packs on the cheeks for about 15 minutes each time to temporarily relieve the pain. 3. Local treatment: If the pain is more intense, you can go to the dentist to ask a professional doctor to clean the teeth locally or apply medication, etc., so as to relieve the pain. Pregnant women with severe toothache or has not been relieved, should immediately consult a doctor, under the guidance of the doctor’s standardized treatment, should avoid self-medication, so as not to affect the growth and development of the fetus and lead to serious consequences. Usually should try to eat less spicy and stimulating food, to prevent aggravating the symptoms of toothache.