The causes of slight pain in the abdomen after intercourse are as follows: 1, sexual stimulation factors: it may be directly caused by the stimulation of sexual life, or after sex, semen into the woman’s body, the stimulation of the semen on the woman’s body caused. 2, blood stimulation: sex occurs when women will also produce sexual excitement, this time the blood will gather in the small abdomen and near the sexual organs. As sex proceeds, women may reach orgasm or not respond. This is the first time that a woman has ever been in a situation where she has to go back to other parts of her body or gather in these parts for a while, which may produce the symptoms of slight pain in the small abdomen. 3. prostaglandin stimulation: After sex, if the man ejaculates normally, the semen enters the woman’s body and the semen itself contains prostaglandin, which triggers contraction of the uterus. So it will also produce the feeling of slight pain in the small abdomen after sex, with the extension of time, the pain gradually disappears, and there is no big impact.