The main causes of occasional tingling in the stomach in the third month of pregnancy include uterine enlargement, early contractions, preterm miscarriage, ectopic pregnancy and other causes of physical illness. Patients are suggested to go to hospital for ultrasound examination to determine the cause and treat the cause. 1. uterine enlargement: if the ultrasound examination report is normal, it may be due to the enlargement of the uterus caused by the increase of the fetus, pulling the uterine ligaments, resulting in tingling pain in the stomach, which usually does not require treatment. 2. early contractions: manifested as occasional abdominal tightness after the third month of pregnancy, or with mild pain, which may be stabbing pain, occurring at It is recommended to go to the hospital and follow the medical advice for bed rest or fetal preservation treatment; 3. Pre-eclampsia: the patient not only has tingling pain, but also a small amount of vaginal bleeding, so it is necessary to go to the hospital at the first time and follow the medical advice for fetal preservation treatment; 4. Ectopic pregnancy: it may also be caused by ectopic pregnancy, so it is recommended to go to the hospital to check the blood HCG, and at the same time to do ultrasound to determine the condition of the pregnancy sac, and take medication or 5, other diseases: in addition, ovarian cysts, adnexal inflammation and other diseases can also lead to abdominal tingling, the cause needs to be determined and targeted treatment. During pregnancy, we should pay attention to rest and not to exercise strenuously, but we can do some gentle activities such as walking, yoga, etc. Also usually pay attention to nutritious diet, but try to avoid cold foods such as crabs, otherwise it may cause bloating or diarrhea, and if there is severe diarrhea, it may increase the risk of preterm abortion.