Pelvic inflammatory disease is a common gynecological disease that is caused by pathogens that infect the pelvis, resulting in congestion, edema and exudation of the pelvic connective tissue. The patient often has lower abdominal pain and increased vaginal discharge as the main symptoms. Understanding the causes of pelvic inflammatory disease helps to prevent it in daily life. The actual fact is that you will find a lot of people who are not able to get a good deal on this kind of things. If you are in the period, still often eat the above-mentioned food, is likely to lead to poor menstrual blood, long-term blockage in the uterus, inducing inflammatory lesions, prompting local congestion, thus triggering pelvic inflammatory disease; 2, do not pay attention to personal hygiene: usually do not pay attention to personal hygiene care, especially the period change sanitary napkin is not timely easy to breed bacteria, leading to pathogens invasion; 3, frequent sexual life: the process of sexual life will be pathogens Three, retrograde infection invades the vulva, vagina pathogens, or vaginal parasites, along the vaginal mucosa spread to the ovaries and abdominal cavity, resulting in pelvic inflammatory disease. IV. Inflammatory spread 1. Intra-abdominal inflammation: Inflammation of adjacent organs in the pelvis spreads directly, such as appendicitis and peritonitis, which can spread directly and cause pelvic inflammatory disease due to the proximity of female internal genital organs; 2. V. Surgical causes 1. birth: women are weaker after birth, residual placenta, fetal membranes, birth canal injuries and residual wounds at the cervical opening can cause bleeding, which can lead to infection and eventually pelvic inflammatory disease if not treated in a timely manner. 2. abortion: the process of spontaneous abortion and medication abortion is long, there is continuous bleeding in the vagina or tissue residue in the uterine cavity, and the aseptic requirements for surgical abortion are not strict. The most important thing is to have a good understanding of the situation.