How to deal with papular urticaria?

Written by Liu Gang
Dermatology
Updated on May 08, 2025
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Papular urticaria is a type of contact allergic disease, often related to mosquito or flea bites. It manifests as red papules or central red wheals at the site of contact, with either a red puncture mark or blisters. For such conditions, the most common treatment is anti-allergy therapy, such as topical application of calamine lotion and oral antihistamines like loratadine. If the central blister is large, it can be disinfected with iodine, punctured, and the fluid squeezed out. It is advisable to avoid keeping small animals at home, maintain a standardized diet and lifestyle habits, avoid mosquito-infested areas, and ensure that clothing and bedding at home are thoroughly sunned and disinfected.

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Written by Liu Gang
Dermatology
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How long does papular urticaria heal by itself?

Papular urticaria is a type of allergic reaction, mostly related to contact with irritants or bites from mosquitoes, fleas, and similar insects. Typically, it causes red wheals to appear on localized areas of the body, often topped with a small secondary lesion or blister. Most cases involve itching. Generally, papular urticaria can resolve on its own within about a week without treatment. However, if the symptoms are severe, and the blisters are large, scratching them open can lead to infection, which will prevent natural healing. It is best to treat papular urticaria as soon as it appears using antiallergic medications either topically or orally, which usually lead to a quick recovery. After recovery, it is crucial to maintain a proper diet and lifestyle habits, avoid keeping small pets at home, stay away from areas with dense vegetation, and ensure bedsheets and covers are sun-dried to sterilize and kill germs.

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Written by Liu Gang
Dermatology
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What causes papular urticaria?

Papular urticaria is a type of allergic reaction, often related to direct contact with irritants, or bites from mosquitoes, fleas, and other insects. It also relates to an individual's physical constitution; some people are more sensitive and may develop erythema or blisters in response to minor external irritants. This condition is also linked to one's home environment, such as frequently keeping pets or not regularly sunning beddings, which might harbor mold and mites. Once the condition occurs, it is advisable to regularly disinfect and sun-expose bedding, avoid contact with small animals, and stay away from parks or areas with dense vegetation. Topical application of anti-allergic medications can treat the condition. (Note: The doctor's answer is for reference only. Medications should be taken under the guidance of a professional physician, and self-medication should be avoided.)

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Written by Huang Ling Juan
Dermatology
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Is it normal for papular urticaria to be neither painful nor itchy?

Papular urticaria is neither painful nor itchy and is also considered normal. The occurrence of papular urticaria, which is neither painful nor itchy, is related to the consumption of some anti-allergic drugs, and also due to a mild allergic reaction to external factors. It also has something to do with individual physical constitution. Papular urticaria generally results from allergic reactions caused by bites from mites, fleas, mosquitoes, and other such pests. Most people will experience obvious itching, and some may also feel pain in addition to the itching. For cases of papular urticaria, patients can apply anti-allergic medications under the guidance of a doctor. Common choices include desonide ointment or fluticasone propionate ointment for itching, often in combination with oral antihistamines such as cetirizine tablets. (Under medical guidance for medication use)

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Written by Liu Gang
Dermatology
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The difference between papular urticaria and chickenpox

Papular urticaria is a type of red wheal that appears on the body after an allergic reaction, and may be associated with small blisters. It often relates to contact with irritants or insect bites. This condition is not contagious and can be cured in a short time with proper treatment, including the use of anti-allergy medications, although it may recur. Chickenpox is caused by the varicella-zoster virus infection, and is highly contagious, spreading through contact and air between individuals. It generally results in small blisters all over the body, especially on the scalp, and may be accompanied by fever symptoms. Chickenpox usually provides lifelong immunity, meaning that once a person has it, they are unlikely to have it again.

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Written by Liu Gang
Dermatology
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Can people with papular urticaria eat fish?

Papular urticaria is a type of allergic reaction, related to direct contact with irritants or bites from mosquitoes and fleas. During treatment for this condition, it is generally advised to avoid eating spicy foods, fish, and shrimp, as these can aggravate allergic diseases by inducing inflammation or worsening itching. Severe scratching may also lead to the formation of small blisters, which, if burst, could potentially cause bacterial infection. Therefore, this disease must be treated formally. It is advisable to avoid spicy and irritating foods, refrain from staying up late, and avoid places with a high presence of mosquitoes and fleas. Pets should not be kept in the home; if pets are present, it is crucial to maintain their hygiene and regularly disinfect and expose bedding and covers to sunlight.