What Are the Symptoms of Artificial Urticaria?

Urticaria is a common condition in daily life. Severe urticaria can cause patients intense, unbearable itching. What are the symptoms of dermatographism?

What Are the Symptoms of Dermatographism?

The hallmark symptom of dermatographism is the appearance of raised, red wheals along scratch marks following mechanical stimulation (e.g., scratching) of the skin, accompanied by prominent pruritus. Treatment typically includes antihistamines such as loratadine tablets, calcium supplements, and traditional Chinese herbal medicines for wind-dispelling. In contrast, when the skin is scratched or rubbed with a fingernail or other blunt object, transient wheals—often without itching or other discomfort—may appear. Another variant, known as symptomatic dermatographism, is more frequently observed in young individuals with allergic constitutions.

The underlying mechanism involves an allergic reaction triggered in the skin upon exposure to external physical stimuli, leading to mast cell degranulation and release of histamine and other biologically active mediators. This results in cutaneous capillary dilation and increased vascular permeability, allowing plasma and tissue fluid to leak into the dermis. Dermatographism has two main subtypes: one is termed “simple” or “idiopathic” dermatographism, which occurs predominantly in women and represents a physiological abnormality.

Conversely, after being scratched or rubbed with a fingernail or other blunt object, affected skin first develops localized erythema, followed by edematous swelling elevated above the surrounding skin surface, with surrounding erythema (flare) at the margins of the lesion. Individuals with dermatographism often experience spontaneous, unexplained pruritus. We hope this information is helpful to you!