Can allergic purpura cause fever?

Written by Yang Ya Meng
Rheumatology
Updated on May 16, 2025
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Patients with allergic purpura may experience fever, which we call immune fever. To treat such fevers, we need to use non-steroidal anti-inflammatory drugs, commonly used ones include diclofenac sodium sustained-release tablets. Also, if patients with allergic purpura develop fever symptoms, we need to rigorously differentiate whether there is a concurrent infection. We must inquire whether the patient has symptoms of infection such as cough, expectoration, abdominal pain, diarrhea, frequent urination, urgent urination, etc. If the patient shows these symptoms, we then consider that the patient with allergic purpura may also have an infectious fever. In such cases, treatment should include the use of antibiotics like cephalosporins, penicillin, etc. Note: Follow medical advice regarding medication use.

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Written by Yang Ya Meng
Rheumatology
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Precursors of recurrent allergic purpura

The precursors of a relapse of allergic purpura typically occur in patients after exposure to cold, strenuous exercise, or allergens, manifesting as purpuric rash on the skin. Additionally, some patients may experience gastrointestinal reactions such as nausea, vomiting, abdominal pain, and diarrhea. More severe cases can present with symptoms of allergic purpura and purpura nephritis, primarily characterized by edema and significant proteinuria indicated in routine urine tests. If patients experience the aforementioned symptoms, it is crucial to be vigilant about the possibility of a relapse of allergic purpura and to seek medical attention promptly to prevent further progression of the disease.

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Written by Li Jing
Rheumatology
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Can allergic purpura be cured completely?

Allergic purpura is a special type of vasculitis and also a hypersensitivity disorder. It commonly occurs in adolescents and children aged 5 to 14, with a higher incidence rate in the spring and autumn seasons. The disease frequently relapses and cannot be completely cured. The most common causes of allergic purpura include infections, medications, and foods. Infections are the most frequent cause, such as bacteria, viruses, parasites, tuberculosis, etc. If it is merely a cutaneous form, no special treatment is required at this time, and bed rest alone can alleviate the condition. If there is the presence of blood or protein in the urine, and renal biopsy shows a large number of crescents, it then indicates a serious aggravation of the condition.

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Written by Li Jing
Rheumatology
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What causes allergic purpura?

Allergic purpura commonly occurs in adolescents and children, characterized by frequent relapses and being intractable. It is primarily seen in youth aged between 5 to 14 years. As they age and their immunity strengthens, the frequency of episodes gradually decreases. The most common causes of allergic purpura include infections such as bacteria, viruses, parasites, mycoplasma infections, and allergies to medications and foods, with food allergies mainly stemming from high-protein foods like fish and shrimp, which can easily trigger allergic reactions. Therefore, once skin purpura or proteinuria appears, it is crucial to rest in bed until the pain and proteinuria dissipate and the purpura eases. During treatment, it is also important to avoid cold exposure and overexertion.

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Written by Yang Ya Meng
Rheumatology
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Symptoms of allergic purpura

Allergic purpura, which we generally divide into four types. The first type is the mildest, often primarily characterized by purpuric rash-like skin manifestations. The second type we call allergic purpura arthritis type, where patients, in addition to the typical rash, also experience joint pain symptoms. The third type we refer to as the renal type of allergic purpura, where patients often present primarily with hematuria and proteinuria, and urine tests typically indicate positive urinary protein. The fourth type we call the abdominal type of allergic purpura, where patients suffer from nausea, vomiting, abdominal pain, and diarrhea as their main clinical manifestations.

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Written by Yang Ya Meng
Rheumatology
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Can people with allergic purpura take baths?

Patients with allergic purpura can take baths, but the water temperature should not be too hot. This is because excessive heat or vigorous exercise can potentially trigger a recurrence of allergic purpura. Additionally, patients should avoid getting cold to reduce the risk of infection, as infections can also provoke episodes of allergic purpura. During an episode of allergic purpura, it is necessary to take some anti-allergy medications and medications that reduce rashes, such as desloratadine dispersible tablets and compound glycyrrhizin tablets. If there is significant involvement of vital organs, such as the kidneys or gastrointestinal tract, some patients may also need to use corticosteroids. (Medication should be taken under the guidance of a doctor.)