Which location of the Zusanli (ST36) acupoint is the Fenglong (ST40) acupoint?

Under normal circumstances, the Fenglong (ST40) acupoint is primarily located 5 cun below the Zusanli (ST36) acupoint. The specific details are as follows:

Both the Fenglong and Zusanli acupoints are considered health-promoting points. The precise location of the Fenglong point is on the outer side of the lower leg, 8 cun directly above the tip of the external malleolus,and 5 cun below the Zusanli point. It belongs to the stomach meridian but does not lie along the same line as the main course of the stomach meridian. Clinically, it is commonly used to treat discomforts such as cough and excessive phlegm, as well as phlegm accumulation caused by local meridian blockages. Moxibustion is often employed as a treatment method—by placing and igniting moxa on this acupoint, medicinal components can quickly penetrate into the corresponding meridians and acupoints, helping to warm the meridians and nourish the collaterals. However, due to the unique nature of this acupoint, such treatments should be performed under the guidance of a physician to avoid potential burns to the local skin during moxibustion.

Given the large number of acupoints in the human body, care should be taken in daily life to avoid bumps or injuries, especially in areas such as the lumbar and cervical vertebrae, which contain numerous nerve tissues. Severe impacts may lead to bodily injury, and in serious cases, could even result in paralysis.