Tummy pain on the second day after delivery is a sign of contraction of the uterus after delivery, which is a normal physiological symptom. During this period, there will be malodorous discharge, the amount of bleeding will not be particularly large and the amount of menstruation is basically similar, during this period try to pay attention to not strenuous exercise, you can moderate the amount of walking on the ground, so as to promote the discharge of blood in the uterus. You should also pay attention to keep warm, do not catch a cold, when there is pain in the stomach can be hot compresses with hot water bags, or warming treatment with warming paste. During this period, you can also take the massage treatment, which can relieve the phenomenon of stomach pain caused by uterine contraction. During the postpartum period, the pain in the stomach is more severe during the first two days and gradually decreases after a week. It takes about a month for the uterus to return to its pre-pregnancy state.