Usually eat the pill small stomach have some slight pain, belong to the normal phenomenon. Contraceptive pills belong to the hormone drugs, will have a certain impact on the female endocrine, causing a slight abdominal pain in the belly. If there is severe pain in the small stomach, it may be caused by other reasons, it is recommended to improve the relevant examination, may be some other gynecological diseases, such as ovarian torsion, acute adnexitis and so on. It may also be caused by other diseases, such as proctitis, ulcerative colitis, etc. It is recommended to go to a regular specialized hospital for systematic examination and clear diagnosis.