Itching is an uncomfortable feeling on the skin that makes a person want to scratch. We often have normal itching, which is not a disease. For example: tight socks or trousers may cause a slight itch where they press on the skin; the skin may feel a little itchy after shaving; wearing wool or rough fabrics can make the neck or wrists feel itchy or prickly; when a wound is healing, the area may become slightly itchy. These types of itching are normal and are not signs of illness.

Pathological itching may indicate an underlying health problem and can greatly affect a person’s quality of life.

Pathological itching (disease-related itching) is different. It may happen occasionally, come and go, or last for a long time. It can be mild or very severe. Severe itching can interfere with daily life, cause difficulty sleeping, affect mood and concentration and lead to stress and emotional discomfort. In short, normal itching is temporary and harmless, while pathological itching may indicate an underlying health problem and can greatly affect a person’s quality of life.

According to Traditional Chinese Medicine (TCM), itching is usually related to wind pathogens. Wind conditions tend to develop quickly, change constantly, move from one place to another, and may affect large areas of the body. Wind pathogens can consume the body’s blood and body fluids, causing dryness of the skin. They often affect the upper part of the body or the superficial body. In TCM, wind is also believed to carry other disease-causing factors into the body, making the condition more complicated. TCM also claims that severe itching can disturb the Heart’s spirit (shen). As a result, a person may experience irritability, restlessness and difficulty sleeping (insomnia). There are many causes of itchy skin, and different causes produce different symptoms. TCM physicians use the four diagnostic methods (looking, listening/smelling, asking, and pulse-taking) to assess patients and make a diagnosis. They collect all the patient’s symptoms and signs, then identify a specific pattern of disharmony (syndrome) that explains the condition. Identifying the underlying pattern helps guide the treatment and management of itching.

Clinical criteria for TCM physicians to diagnose itchy conditions are as below.

Acute itching often presents features such as coming on suddenly, changing quickly, moving from one area to another, affecting different parts of the body, often accompanied by redness, rash, or irritation and is commonly related to the invasion of wind pathogens. Common disharmonies of acute itching include:

• Wind-cold disharmony: severe itching that usually aggravated in cold or windy environment; individuals are also sensitive to low temperatures, and the pulse is floating and slow.
• Wind-heat disharmony: severe itching that usually aggravated in a hot environment and alleviated in cold environment; individuals also accompany with thirst and a floating and rapid pulse.
• Wind-damp-heat disharmony: severe itching with blisters or fluid discharge in the affected body surface. The skin is often moist, inflamed, or weeping.
• Blood over-heated disharmony: the itching is often accompanied by skin lesions such as red patches, swelling and hives. Individuals tend to have irritability and a deep red tongue.

TCM physicians identify the disharmony patterns based on the patient’s symptoms and signs, and treatment is aimed at addressing the underlying imbalance rather than simply relieving the itchiness.

Chronic itching usually causes skin lesions.

Chronic itchy conditions that last for months are more complicated, itching may involve not only wind-related disharmonies but also cold, dampness, blood stasis, phlegm, and deficiencies that generate endogenous wind. Common disharmonies include the following:

• Cold disharmony: usually caused by endogenous cold, often related to yang deficiency of spleen and stomach. The skin may not appear red rash and swelling but develops nodules or ulcers. Individuals also have cold signs such as aversion to cold, limb coldness, abdominal distention, loose bowels and lumbar soreness.
• Damp disharmony: this pattern is characterized by damp, oozing skin lesions. Common features include intense, localized itching, moist or weeping skin lesions, clear fluid discharge, recurrent blisters, and skin lesions that gradually spread. There may be white, greasy tongue coating, and rolling or deep, slow pulse.
• Blood stasis disharmony: this pattern is associated with poor circulation. Besides persistent itching, purplish skin discoloration, bruise-like spots (purpura), hyperpigmentation and nodules or thickened lesions may be found on the skin.
• Phlegm disharmony: this type often involves chronic, long-standing skin lesions. Besides chronic itching, nodules, nodular lesions, plaque-like lesions, dry-scaly patches, and thickened areas can be found on the skin.
• Wind formation from blood deficiency: this is a common cause of chronic generalized itching. Common features include widespread itching over the body, persistent but less intense itching, dry and rough skin, scaling and flaking, scratch marks or blood crusts, and thickened skin from repeated scratching. A pale tongue or tongue with teeth marks, deep, thready, or slow pulse.
• Wind formation from yin deficiency: this usually occurs when yin fluids are depleted and fail to nourish the body. Common features include generalized itching that tends to worse at night, individuals also have throat dryness, night sweats, warm feelings in the palms and soles, or insomnia; a red tongue with little coating, and a thready pulse.
• Yang deficiency with wind / qi deficiency with wind: these patterns are like the cold disharmonies. Common features include itching triggered easily by weather or seasonal changes, increased sensitivity to wind and cold, fatigue or low energy

In clinical practice, most patients present with a combination of disharmony patterns rather than a single, isolated pattern. These patterns may also change over the course of the condition. Therefore, an experienced TCM physician is essential for making an accurate diagnosis and selecting the most appropriate treatment.

TCM treatment for itching commonly combines internal and external therapies. Oral herbal remedies are used to correct the underlying internal imbalance, while external treatments, such as herbal washes, creams, or lotions, act directly on the affected skin to provide faster symptomatic relief.

It is important to recognize that long-term improvement depends on identifying and addressing the underlying cause of itching. Patients may need further medical evaluation and diagnostic testing to rule out conditions such as diabetes, liver disease, allergies, or other systemic disorders that can contribute to itching.

In addition, individuals should pay attention to factors in their daily lives and environment that may trigger or worsen their symptoms. Common aggravating factors include scratching, excessive skin irritation, unsuitable skincare products, alcohol consumption, smoking, caffeine-containing beverages, and spicy foods.

With appropriate treatment, proper skin care, and management of the underlying cause, itching can usually be effectively controlled and gradually improved.

Further Reading:

TCM Diagnositic principles    Four examining skills    Organ systems   Six evils   Qi & blood

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