HT5 Penetrating the Interior

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

HT5 (Tongli, “Penetrating the Interior”) is the Luo-connecting point of the Heart Channel of Hand-Shaoyin Meridian. It is located on the palmar aspect of the forearm, 1 cun proximal to the wrist crease, on the radial side of the flexor carpi ulnaris tendon. It calms the spirit, regulates heart rhythm, benefits the tongue.

Location

On the palmar aspect of the forearm, 1 cun proximal to the wrist crease, on the radial side of the flexor carpi ulnaris tendon.

Needling

Perpendicular insertion 0.3-0.5 cun.

TCM functions

Calms the spirit, regulates heart rhythm, benefits the tongue.

Indications

Palpitations, arrhythmia, aphasia, stiffness of the tongue, mental disorders.

Luo-connecting

Clinical notes

As the Luo-connecting point of the Heart meridian, HT5 is vital for connecting with the Small Intestine meridian and influencing the tongue and speech. It is a primary point for regulating heart rhythm, making it effective for arrhythmias, palpitations, and bradycardia. Its spirit-calming properties address anxiety and emotional distress, while its connection to the tongue makes it invaluable for speech disorders like aphasia, stuttering, and stiffness of the tongue. It is often paired with PC6 for regulating heart rhythm.

On the Heart Channel of Hand-Shaoyin channel

HT5 is one of 9 points on the Heart Channel of Hand-Shaoyin Meridian. Nearby points:

Frequently asked questions

Where is HT5 located?

HT5 (Tongli) is located on the palmar aspect of the forearm, 1 cun proximal to the wrist crease, on the radial side of the flexor carpi ulnaris tendon.

What is HT5 used for?

HT5 calms the spirit, regulates heart rhythm, benefits the tongue. Common clinical indications include palpitations, arrhythmia, aphasia, stiffness of the tongue, mental disorders.

How is HT5 needled?

Perpendicular insertion 0.3-0.5 cun.

Which meridian is HT5 on?

HT5 is a point on the Heart Channel of Hand-Shaoyin Meridian (Shǒu Shàoyīn Xīnjīng).

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⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.