The hidden pain in the stomach at 14 weeks of pregnancy may be a normal physiological phenomenon, or it may be caused by pre-miscarriage, digestive system diseases, etc., and you should consult a doctor to find out the cause. 1. Physiological factors: Considering that it may be caused by the enlargement of the uterus and the increase in local blood flow, if the pain is mild, there is no need to worry too much. 2. Pre-eclampsia: Pre-eclampsia refers to a small amount of vaginal bleeding before the 28th week of pregnancy, followed by paroxysmal lower abdominal pain or lower back pain and other symptoms, which is related to fetal factors, maternal factors, environmental factors and so on. 3. Digestive system problems: may not be directly related to pregnancy, ulcers, inflammation and other diseases of the digestive tract, may also cause stomach pain symptoms. In addition to stomach pain, this part of the patient may also have bloating, diarrhea and other symptoms. During pregnancy, pay attention to rest more, at the same time should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.