The term “Beng Lou” refers to uterine bleeding in women outside their regular menstrual periods. Profuse, gushing bleeding is termed "Beng," while prolonged menstruation with scanty, lingering, non-clearing bleeding is termed "Lou." Clinically, it is commonly seen in adolescents and perimenopausal women, representing a common condition among women.

2010 year October early, an anxious mother brought her 20-year-old daughter to our clinic for consultation. It turned out that since her menarche at age 12, her menstrual cycles had been irregular, often occurring twice a month. Bleeding sometimes lasted over ten days, stopped for a few days or a week, then resumed. She even experienced a sudden severe hemorrhage requiring an emergency room visit. After consulting Western gynecology specialists, she was prescribed estrogen medications such as Marvelon. While high doses could alleviate symptoms during bleeding episodes, they never provided a permanent cure, and her periods still failed to arrive on schedule.

This menstrual bleeding has lasted for a week, with bright red blood. After taking Marvelon, the flow decreased slightly, but there were no signs of cessation. Upon examining the girl's tongue, the tip was red with a pale yellow greasy coating. Palpating the pulse revealed a rapid rate with a prominent position at the right Guan site. Additionally, she presented accompanying symptoms such as yellow urine, irritability, and poor sleep. Based on these findings, the diagnosis points to liver and kidney yin deficiency with internal heat, and instability of the Chong and Ren meridians. This condition is relatively common among adolescent girls. An initial treatment plan was formulated to nourish yin and benefit the kidneys, clear heat and calm the liver, stabilize the Chong meridian, and stop bleeding. The prescription included: Ligustrum lucidum (Nvzhenzi), Eclipta prostrata (Hanliancao), Raw Rehmannia root (Shengdi), Cirsium japonicum (Xiaoji), Cornus officinalis (Shanzhuyu), Lotus stamens (Lianxu), Rubia cordifolia (Qiancao), Cuttlebone (Wuzhegu), Charred Typha pollen (Puyangtan), Charred Sanguisorba root (Diyutan), Donkey-hide gelatin (Ejiao), Calcined oyster shell (Duan Muli), Charred ginger (Pao Jiangtan), and Motherwort (Yimucao). After taking three to four doses, the bleeding volume decreased by more than half, and it ceased completely within a week.

Although the bleeding had stopped, it did not mean the illness was cured. The pulse remained rapid, and the redness at the tongue tip had not subsided, indicating that the internal heat had not yet cleared and the Chong and Ren meridians remained unstable. The treatment continued with nourishing yin, benefiting the kidneys, calming the liver, and stabilizing the Chong meridian. The prescription consisted of: Ligustrum lucidum, Eclipta prostrata, Raw dragon bone, Raw oyster shell, Raw Rehmannia, Cornus officinalis, Lotus stamens, Prepared fleeceflower root, Atractylodes macrocephala, Poria, and Tangerine peel. Additionally, the girl was instructed to measure her basal body temperature every morning starting from that day to help monitor disease progression. Only when a biphasic temperature pattern appears does it indicate normal ovulation, signifying a complete cure and ensuring no future issues with pregnancy or childbirth.

Her next period arrived 18 days after the previous one ceased, showing a monophasic basal body temperature. Urine was no longer yellow, sleep was good, irritability decreased, tongue color turned pale red with a white greasy coating, and the pulse remained slightly rapid. Continuing with the previous therapeutic approach, during the menstrual phase she was administered formulas to nourish yin, benefit the kidneys, stabilize the Chong meridian, and stop bleeding, which cleared up in five days. Upon inquiry, the girl reported postprandial abdominal bloating, poor appetite, aversion to greasy or meaty foods, and bowel movements only once every two to three days. This indicated spleen deficiency with impaired transportation. At this stage, emphasis was placed on strengthening the spleen and aiding digestion. Only when spleen and stomach digestive and absorptive functions are normalized can tonics for the liver and kidneys take effect without generating phlegm or dampness. Prescription: Xiangsha Liujunzi Decoction 100 grams, taken once at noon daily, with 6 grams dissolved in water to drink, while taking the yin-nourishing and kidney-benefiting formula in the morning and evening.

After twenty days of medication, her appetite improved, abdominal bloating resolved, and bowel movements became regular. Her next period arrived on schedule (28 days), clearing up in five to six days. Basal body temperature showed an atypical biphasic pattern, with the elevated phase lasting around 7 days. Tongue was pale red with a thin white greasy coating. Pulse was slightly rapid, with the left radial pulse leaning fine. The condition was not yet fully resolved, so further regulation and treatment continued, strengthening kidney-tonifying and ovulation-promoting herbs such as Cuscuta seed, Lycium fruit, Dipsacus root, and Raspberry.

Through three to four months of treatment following this regimen, each period arrived on time, with a cycle length of approximately 28 days. Two days ago, the girl returned for a follow-up visit. Her basal body temperature for this month displayed a typical biphasic pattern, with the elevated phase already sustained for twelve days. During the intermenstrual phase, egg-white-like cervical mucus appeared, lasting two to three days, which is indicative of ovulation. It is predicted that her period will arrive in two to three days. With at most one more menstrual cycle of regulation, the treatment goal will be fully achieved.