The main reason why women experience vague pain in the lower abdomen after masturbation is that they will also reach orgasm when masturbating, then orgasm will cause contraction of the uterus and will feel vague pain in the lower abdomen. If this pain lasts longer, consider whether there is also pelvic inflammation, it is best to go to the hospital to do the corresponding examination, and then if there is inflammation timely anti-inflammatory treatment. If the lower abdominal pain is relatively short, it is caused by uterine contractions and no clinical intervention can be given. But it is advisable to quit the habit of masturbation, because long-term masturbation can lead to mental depression, or insomnia. So it is best to quit.