Pinyin: Nèi Xī Yǎn
With the knee flexed, inferior to the patella, in a depression medial to the patellar ligament.
Dubi ST-35 is at the same level, in a depression lateral to the patellar ligament.
Both points form the Extra point of Xiyan EX-LE-5.
It is recommended to flex the knee to better locate the point.
There are two eyes of knee located on the level of the lower border of the patella, lateral and medial to the patellar ligament.
The medial one is Neixiyan EX-LE-4.
0.5–1 cun vertically or obliquely towards the lateral eye of the knee.
Caution: Do not needle too deeply to avoid intra-articular puncture.
Dubi ST-35 and Neixiyan EX-LE-4 form the Extra point of Xiyan EX-LE-5. All of them are important local points in treating various knee disorders such as swellings and pain.