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Lochia retention is caused by the damage to the Zang-Fu organs due to overwork after childbirth, leading to deficiency and depletion of Qi and Blood. It may also result from cold pathogens lingering in the uterine collaterals, or from exposure to wind and cold after delivery. The wind-cold pathogen takes advantage of the deficiency to contend with the blood, causing stagnation and obstruction, preventing its free flow, and accumulating inside the body, thus resulting in the retention of lochia. It is appropriate to employ methods that warm the vessels and invigorate blood circulation, so that the blood flows freely. In cases where dryness-inducing medicines have been taken, causing blood exhaustion and inability to resolve stagnation, only warming and tonifying Qi and Blood will restore free flow; attacking purgatives must be avoided, as they will only induce other diseases.

Postpartum lochia non-stop (prolonged postpartum bleeding) is caused by injury to the meridians and blood during delivery, leading to insufficiency and inability to consolidate; or if lochia (residual stasis) is not completely expelled, new blood cannot settle; or due to Yin deficiency generating internal heat, where heat contends with the blood level; or due to lingering cold causing disharmony of Qi and Blood. All these conditions should be carefully diagnosed by correlating pulse findings. In cases of extreme deficiency, only warming and tonifying to generate new blood will allow stasis to dissolve naturally; in cases of mild deficiency, methods to remove stasis and generate new blood are suitable.

For postpartum lochia non-stop: If Liver Qi is hot and unable to generate blood, use Liuwei Wan (Six-Ingredient Pill); if Liver Qi is deficient and unable to store blood, use Xiaoyao San (Free and Easy Wanderer Powder); if Spleen Qi is deficient and unable to control blood, use Liujunzi Tang (Six-Gentleman Decoction); if Stomach Qi sinks and fails to command blood, use Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction); if Spleen channel has stagnant heat causing blood to fail to return to its source, use Jiawei Guipi Tang (Modified Restore the Spleen Decoction); if Liver channel fire causes Ying Blood to move recklessly, use Jiawei Siwu Tang (Modified Four-Substance Decoction); if both Qi and Blood are deficient, use Shiquan Dabu Tang (Ten Complete Great Tonifying Decoction); if Liver channel is invaded by Wind Pathogen causing blood to boil, use Yiwai Fangfeng Wan (Single Ingredient Saposhnikovia Pill); if excessive sexual activity or anger damages the Chong and Ren vessels, causing prolonged bleeding, use Liuwei Dihuang Tang (Six-Ingredient Rehmannia Pill) added with Ejiao (Donkey-hide Gelatin), Maidong (Ophiopogon Tuber), and Wuweizi (Schisandra Fruit).

The head is the convergence point of all Yang channels. After childbirth, the Five Zang organs are all deficient, Stomach Qi is weak, and dietary nourishment is insufficient, causing Deficient Yang to lose its anchor and rush upward to the head. This results in a state of Excess Yang and Deficient Yin, leading to headache. Occasionally, headaches are caused by stale blood (stasis), which is essentially turbid Qi residing in the upper part. Although symptoms such as fever and aversion to wind may appear, only Shenghua Tang (Generate the New Decoction) with modifications should be used; one must strictly avoid using Qianghuo (Notopterygium Rhizome) and Duhuo (Angelica Pubescens Root). This is because True Yang is damaged, allowing Turbid Yin to invade the upper region and sink into the Marrow Sea, causing distension and pain. Without the restoration of Clear Yang ascending, Turbid Yin cannot descend. This pathology arises from internal pathogens, unlike external pathogens which can be resolved through sweating and releasing the exterior.