Last updated: 4 Aug 2025 | 302 Views |
Pityriasis Rosea (风热疮)
Also known in Traditional Chinese Medicine (TCM) as 风癣 (Fēng Xuǎn)
Pityriasis rosea is a type of inflammatory skin disease that presents with rose-colored, scaly rashes. In Traditional Chinese Medicine (TCM), it is referred to as "Feng Xuan" (风癣). The condition often begins with a single large pink or red patch on the torso, known as a "herald patch," followed by smaller, round or oval lesions that spread along the lines of the skin on the body, arms, and legs. It is commonly seen in teenagers and young adults and tends to occur more frequently during the rainy season.
Causes
The exact cause of pityriasis rosea is still unknown. However, it may be linked to viral infections, bacterial or fungal agents, or even parasites. The body’s immune response, especially involving T cells, may also play a role in its development.
From the perspective of Traditional Chinese Medicine, the condition may arise from excessive consumption of spicy foods or emotional stress, leading to internal heat and stagnation of blood. When this heat is affected by wind, it can manifest as skin eruptions on the surface.
It is important to differentiate pityriasis rosea from other skin diseases with similar symptoms, such as ringworm (tinea), tinea versicolor, and psoriasis.
Symptoms
Rash usually appears in large numbers on the torso and proximal limbs, often on both sides of the body.
It typically begins with a single large lesion (2–3 cm), oval or round, light red or rose-colored, with fine scaling on the surface. This is known as the “herald patch” or “mother patch.”
Within 1–2 weeks, smaller lesions (called “daughter patches”) appear across the body, arms, and legs, following the skin's natural lines.
Mild to moderate itching may occur. Some people may experience severe itching, while others may have no itching at all.
A few cases may include low-grade fever or general malaise.
The condition generally resolves on its own within 6–8 weeks, though in rare cases, it may last longer than 6 months. Once recovered, recurrence is rare.
Treatment
Pityriasis rosea is a self-limiting condition. However, TCM herbal treatment can help reduce itching, accelerate the healing of the rashes, and shorten the course of the illness. The treatment principle in TCM involves clearing heat and wind, moisturizing the skin, and nourishing the blood to promote healing.
Prevention and Care
- Avoid spicy and overly seasoned foods.
- Refrain from bathing in very hot water.
- Use gentle, non-irritating skincare products.
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Written by:
黄美清 中医师
TCM. Dr. Mananya Anurakthanakorn (Huang Mei Qing)
