Is this the same as Yin deficiency?

While Yin deficiency refers to a general lack of foundational essence, Yin deficiency with internal heat describes cases where heat patterns are prominent alongside that deficiency. The two terms overlap, but they do not cover the exact same scope.

What other patterns are observed together?

We examine heat sensations that worsen at night, burning sensations in the palms and soles, dryness of the mouth and throat, night sweats, and changes in sleep.

How is this distinguished from an actual fever?

First, check for a fever by measuring body temperature. If the fever persists or the general physical condition is poor, medical causes such as infection must be differentiated first.

What should I record before my medical evaluation?

Please note whether heat sensations are more severe in the afternoon or at night, their distribution in the palms, soles, and chest, and any changes in mouth dryness, night sweats, sleep, or bowel movements. We will check during the evaluation if these clues are present together.

Yin deficiency with internal heat looks at whether dryness and nighttime heat sensations occur together

Yin deficiency with internal heat describes a pattern where heat sensations in the afternoon or night, burning palms and soles, dry mouth, night sweats, and insomnia are prominent, along with clues of a deficiency in the body's ability to moisten and stabilize itself. It is not determined by a single heat sensation or a one-time experience of night sweats.

Commonly confused terms and their differences: Yin deficiency broadly refers to a foundational deficiency, while Yin deficiency with internal heat is a branch where heat clues are also prominent. Actual fever, hyperthyroidism, perimenopause, infection, medication, and peripheral nerve issues are separate medical causes; the pattern identification name does not replace the diagnosis of these conditions.
Information to record before your visit: Record when heat sensations are most severe between afternoon and night, their distribution in the hands, feet, chest, and face, and your body temperature. By recording mouth dryness, water intake, urination, sweat that wets the bedding, sleep, bowel movements, menstruation, weight, numbness, and any new medications on the same date, we can see if the clues of deficiency and heat are actually moving together.
Scope of this material: WHO data was used for the scope of traditional medicine terms for Yin deficiency with internal heat, and MedlinePlus and NIDCR data were used to distinguish medical causes of night sweats, thyroid issues, and dry mouth. This page does not confirm a pattern identification or guarantee treatment efficacy. Persistent high fever, unexplained weight loss, shortness of breath, or rapid loss of muscle strength must be evaluated medically first.

Official References

Medical staff who wrote and reviewed this article

Choi Yeon-seung

Chief Director of Baekrokdam Korean Medicine Clinic

The meaning and differentiation scope of Yin deficiency with internal heat, as well as patient guidance expressions, have been reviewed. The last review date was August 25, 2026.

Graduated from Kyung Hee University College of Korean Medicine
Providing Korean medicine treatment since 2010
Symptom treatment from the perspective of heat-cold balance and constitution

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Check the guides where these terms are used

Symptom and Disease GuideBurning sensation in the soles of the feet

Symptom and Disease GuideDohanjeung (hyperhidrosis) · night sweats

Symptom and Disease GuideBurning Mouth Syndrome

Heat and Cold ColumnIf the soles of my feet and palms feel hot but my test results are normal, could it be due to deficiency heat?

When hospital tests show no specific abnormalities but heat sensations rise to the hands, feet, or face, we examine the cause from the perspective of deficiency heat in Korean medicine and provide criteria for self-assessment.

Heat and Cold ColumnWhen it is hard to fall asleep because your feet feel hot at night: Korean medicine treatment for nighttime heat sensations and sleep

We categorize foot heat sensations that worsen at night into peripheral nerve sensation, burning palms and soles, and Yin deficiency with internal heat, and explain herbal medicine and acupuncture treatments to restore sleep as well.

Heat and Cold ColumnWhy do burning palms and soles and insomnia occur together even when test results are normal?

For those experiencing discomfort from heat sensations in the hands and feet and sleep disorders despite no abnormalities in hospital tests, we examine the cause from the perspective of heat (熱) in Korean medicine and provide criteria for self-assessment.

Medical GuideHow do I distinguish between different types of heat and burning sensations in the soles of the feet or palms of the hands?

Heat in the palms and soles may be centered on a burning sensation rather than actual skin temperature. We first distinguish whether there is numbness or decreased sensation; if the cause is not clear from tests, we determine the direction of Korean medicine treatment by examining whether it worsens at night and its relation to sleep, dry mouth, and fatigue.

Medical GuideIf I have night sweats and changes in temperature sensation, is it an autonomic nervous system problem?

Changes in sweating and temperature sensation may be related to the autonomic nervous system, but that alone cannot confirm the cause. By reviewing the timing and location of sweating, throbbing, changes in weight and sleep, and test results to categorize the heat and cold patterns, we can find points where Korean medicine treatment can help.

Comparison of similar terms

Korean Medicine ConceptYin deficiency

Yin deficiency does not simply mean a lack of body fluids; it is a Korean medicine category determined by observing whether various changes, such as dryness, nighttime heat sensations, night sweats, and dry mouth, appear together. It is not the same as a specific value in a blood test.

Korean Medicine ConceptHeo-yeol

Deficiency heat (Heoyeol) does not mean having a 'heat-prone constitution'; rather, it describes a pattern where heat sensations appear alongside fatigue, changes in sleep, and dry mouth. You should not confirm this diagnosis on your own based on symptoms alone.

Symptom ExpressionNight sweats

Night sweats are symptoms where a large amount of sweat occurs repeatedly during sleep. In addition to indoor temperature, factors such as infection, hormonal changes, medication, and thyroid problems must be checked.

Korean Medicine ConceptBody fluids

Jin-aek (body fluids) is not a single specific fluid like saliva, tears, or sweat, but a Korean medicine term that broadly describes the body's moisture and fluid metabolism. It does not replace medical diagnoses such as dehydration or electrolyte imbalances.