Sudden stomach discomfort and cold sweat at 20 weeks of pregnancy may be due to general conditions such as poor diet and cold, obstetric diseases such as miscarriage, or digestive diseases such as gastroenteritis and appendicitis. 1. General conditions: If you have eaten too much in the last two days, eaten uncleanly, or been cold, it can cause abnormal gastrointestinal motility and induce abdominal pain, cold sweats and other abnormal conditions. 2. Obstetric diseases: 20 weeks pregnant women with abdominal pain, cold sweats, etc., can also be seen in miscarriage, when pregnant women can be due to uterine contractions abdominal pain, often accompanied by vaginal bleeding and other signs of abnormality. 3. Digestive disorders: If you have recently eaten unclean food or too spicy and stimulating food, it can lead to gastroenteritis or appendicitis, resulting in lower abdominal pain, fever, cold sweats and other abnormalities. If abdominal pain occurs in mid-pregnancy, do not be careless, need to consult a doctor as soon as possible, and actively cooperate with the doctor for professional diagnosis and treatment.