How to determine if psoriasis has entered the stationary phase

Nov 28, 2025 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

To determine whether psoriasis has entered the stationary phase, a comprehensive assessment can be made by observing changes in lesion area, scale shedding, intensity of erythema, frequency of new lesions, and severity of itching symptoms. In patients with psoriasis in the stationary phase, existing lesions remain essentially stable in size, showing no significant expansion or spread to surrounding normal skin, with clearly defined borders.

To determine whether psoriasis has entered the stationary phase, a comprehensive assessment can be made by observing changes in lesion area, scale shedding, intensity of erythema, frequency of new lesions, and severity of itching. The specific analysis is as follows:

1. Changes in lesion area: In the stationary phase, the size of existing skin lesions remains largely stable without significant expansion. Lesions no longer spread into surrounding healthy skin, with clear boundaries distinctly separating them from normal skin, showing no signs of spreading or progression.

2. Scale shedding: The amount of silvery-white scales on the surface of lesions noticeably decreases, and shedding occurs less frequently. Unlike the progressive phase, minor touch no longer causes massive scale detachment. Scales adhere more firmly to the skin, and even if they do shed, this does not coincide with an increase in lesion size.

3. Intensity of redness: The color of the red plaques gradually fades, changing from the bright red or deep red seen during the progressive phase to lighter red or dark red. Inflammatory responses within the affected areas diminish, and obvious signs of congestion and swelling subside.

4. Frequency of new lesions: During the stationary phase, new lesions rarely appear. Only pre-existing lesions remain, with no new red patches or scaly areas developing elsewhere on the body. The condition remains stable without new outbreaks.

5. Severity of itching: Patients experience a significant reduction in skin itching, which may even disappear completely. Unlike the progressive phase, intense itching that interferes with daily activities or sleep is no longer present, and overall skin discomfort is greatly reduced, indicating a more stable clinical state.

Determining whether psoriasis has entered the stationary phase requires continuous observation over 1–2 weeks to avoid misjudgment due to short-term fluctuations. If sudden lesion expansion or an increase in new lesions occurs, prompt medical consultation is necessary to adjust the treatment plan and prevent disease relapse.

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