What could cause mild abdominal discomfort the day after intercourse during ovulation, and what should be done about it?

　　Mild abdominal discomfort the day after intercourse during ovulation may be caused by physiological factors or pathological conditions such as pelvic inflammatory disease or endometritis. Targeted treatment is required, and a detailed analysis is as follows:

　　I. Physiological Factors

　　The ovulation period refers to approximately ten days surrounding the actual ovulation date. During this time, follicle rupture may occur, releasing follicular fluid into the pelvic cavity. Intercourse can easily stimulate the pelvic peritoneum, leading to mild lower abdominal pain. This is a normal physiological phenomenon that typically resolves on its own, so there is generally no need for excessive concern.

　　II. Pathological Factors

　　1. Pelvic Inflammatory Disease (PID)

　　Long-term unhygienic intercourse may lead to pelvic inflammatory disease. Inflammatory factors can irritate the mucous membranes of the pelvic lining, and intercourse may exacerbate this irritation, resulting in abdominal discomfort. Treatment may include medications such as Levofloxacin Hydrochloride Tablets or Metronidazole Tablets, taken under a doctor's guidance.

　　2. Endometritis

　　Endometritis usually occurs due to inadequate postoperative care following procedures like dilation and curettage (D&C). Inflammatory factors then stimulate the uterine lining, causing such symptoms. Treatment may include medications such as Clindamycin Hydrochloride Capsules or Penicillin Tablets, taken under medical supervision.

　　In addition to the above, conditions such as endometriosis, vaginitis, and adenomyosis may also cause similar symptoms. It is recommended to seek timely medical evaluation at a hospital to identify the underlying cause and receive appropriate treatment.