TCM Skin CompendiumEducational reference

Comparison

Damp-Heat vs Blood-Heat

Both patterns contain Heat, and both show on the skin as red, itchy disease. They are different in where the Heat sits and what it does. Damp-Heat is Dampness and Heat acting together, so the skin is red and also weepy, sticky and slow to clear. Heat in the Blood is Heat that has gone into the Blood itself, so redness is deeper, bleeding may appear, and the heat is worse at night. This page compares the two as the pattern pages describe them.

How to use this comparison. This is a reading aid, not a diagnosis. A pattern is a framework for reading signs, and more than one pattern can be present at once. Use Start here, the glossary and the pattern self-check for background, and the pattern pages for the full picture.

At a glance

Damp-Heat and Heat in the Blood compared
Damp-HeatHeat in the Blood
What it is Dampness, which is heavy, sticky and slow, combined with Heat, which is red, active and inflammatory. The Heat cannot dry the Dampness and the Dampness cannot clear the Heat. Heat that has gone into the Blood itself. It moves with the Blood, forces vessels open and produces redness that is deep rather than superficial.
Lesions Red, weeping or oozing lesions, with crusting or sticky discharge. They look angry but also weep, and they are slow to heal. Bright red, dusky or purplish lesions, and sometimes pinpoint bleeds under the skin or a rash that does not blanch.
Itch and weeping An itchy, burning quality, with visible oozing or crusting. The itch and the weeping are part of the same picture. Heat and restlessness worse at night, with bleeding as the signature. Weeping is not the defining feature.
Colour and depth Redness with inflammation, sitting with the Dampness on the surface. Deep redness, duskiness or purplish colour, sitting with the Blood rather than on the surface.
What else is reported Heaviness of body and head, chest or upper abdominal fullness, a bitter or sticky mouth, loose foul stools, tiredness in humid weather, oily skin and a muzzy head. Bleeding such as nosebleeds, blood in stool or urine, or heavy periods; flushing in the afternoon or evening; restlessness and poor sleep; thirst for cold drinks; a feeling of heat in the chest; dark concentrated urine.
Tongue and pulse A red body with a yellow greasy coating. A white greasy coat with a pale body would suggest Damp-Cold instead. A deep red tongue, sometimes with red points, and a thin, yellow, dry coat. The pulse is rapid and often forceful.
Treatment direction Clear Heat and drain Dampness together, resolve toxin where there is redness, pus or crusting, and avoid rich tonics while the Dampness is active. Cool the Blood and stop the bleeding at its cause, resolve toxic Heat where present, and avoid letting the cooling create stasis.

The two patterns in brief

The Damp-Heat page describes two influences acting together. Dampness behaves like stagnant fluid, heavy and reluctant to move; Heat behaves like fire, red, hot and drying. When they combine, the Heat cannot dry the Dampness out and the Dampness cannot clear the Heat, so the skin shows both: redness and inflammation from the Heat, and oozing, crusting or sticky discharge from the Dampness. The usual root is the Spleen, whose weakened transforming function lets fluid accumulate, and because the Dampness keeps feeding the Heat, the pattern relapses.

The Heat in the Blood page describes Heat at the Blood level, the deepest layer a pathogen reaches before it disturbs the Yin. This Heat is not cleared by a light sweat and it moves wherever the Blood goes. Its signature is bleeding, because Heat is said to force Blood out of the vessels. The heat is characteristically worse at night, when Blood is said to gather inward, and the face may be flushed in the afternoon or evening.

On the skin

The two pages give a practical contrast. Damp-Heat is wet: the lesion weeps, crusts or discharges, and the surface looks angry but also damp. Heat in the Blood is deep and dry: the lesion is bright red, dusky or purplish, and it may bleed or show pinpoint bleeds under the skin. The itch in Damp-Heat has a burning quality and comes with the oozing. In Heat in the Blood the general picture is of heat and restlessness that is worse at night, and bleeding is the feature that separates it.

The tongue continues the contrast. Damp-Heat shows a red body with a yellow greasy coat, and the page notes that a white greasy coat with a pale body would point to Cold-Damp instead. Heat in the Blood shows a deep red tongue, sometimes with red points, and a thin, yellow, dry coat, with a rapid and often forceful pulse. A fine rapid pulse would instead suggest deficiency Heat, a look-alike the Blood page sets apart.

What each implies for treatment direction

Damp-Heat calls for clearing Heat and draining Dampness together, resolving toxin where there is redness, pus or crusting, and avoiding rich tonics while the Dampness is active. The pattern page lists Huang Qin, Huang Lian, Yi Yi Ren and Cang Zhu among the herbs, and Gan Lu Xiao Du Dan, San Ren Tang, Lian Po Yin and Er Miao San among the formulas. Diet is treated as part of the prescription rather than an optional extra.

Heat in the Blood calls for cooling the Blood and stopping the bleeding at its cause, resolving toxic Heat where present, and avoiding the trap of cooling so hard that stasis forms, which is why cooling herbs are paired with gentle Blood movers. The page lists Mu Dan Pi, Chi Shao, Xuan Shen, Zi Cao and Shui Niu Jiao among the herbs, and Qing Ying Tang and Dang Gui Liu Huang Tang among the formulas.

Conditions that appear in both

Eight conditions appear in the treatment lists of both pattern pages: burning hot skin to the touch, fungal infection, petechiae, skin hypersensitivity to touch, skin inflammation, skin rashes, sunburn and warm skin. That overlap is why the tongue, the oozing and the bleeding signs decide between the patterns rather than the name of the skin condition.

Modern references

PubMed records for the modern, non-TCM discussion of these patterns. They are references, not proof that either pattern explains a skin condition.