Can allergic purpura cause itching?

Written by Li Jing
Rheumatology
Updated on September 19, 2024
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Allergic purpura is mainly seen in adolescents and children, with a higher incidence in spring and autumn. The most common cause is infection, followed by medications or food, which can also trigger an episode of allergic purpura. The most common symptoms include purpura on the skin and mucous membranes, abdominal pain, blood in stools, hematuria, or joint pain. The purpura primarily affects the limbs, rarely appears on the trunk, and is symmetrically distributed. At this time, the bleeding spots often have no symptoms, meaning there is no itching of the skin. However, when there is concomitant skin edema or hives, itching can occur.

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Written by Yang Ya Meng
Rheumatology
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What should I do if I have allergic purpura and my legs hurt?

Patients with allergic purpura who experience leg pain indicate the development of the arthritic type of allergic purpura. Firstly, strict bed rest should be enforced in daily life to reduce the burden on the joints. Secondly, active treatment of the primary cause of allergic purpura should be pursued, which can include taking medications like desloratadine dispersible tablets to reduce the rash. Subsequently, anti-inflammatory and analgesic drugs, such as diclofenac sodium sustained-release tablets, can be taken to alleviate leg pain. If the symptoms do not significantly improve with these measures, the use of a small dose of corticosteroids may be considered if necessary. (Medication should be administered under the guidance of a professional doctor.)

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Written by Li Jing
Rheumatology
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Does allergic purpura spread to others?

Firstly, allergic purpura is neither a genetic nor a contagious disease, so there is no need to worry about it being inherited or transmitted to others. It is an allergic reaction caused by drugs, food, or infections, typically manifested by bleeding and bruising on the skin and mucous membranes of the limbs, joint pain, and hematuria. Diagnosis requires the combination of clinical manifestations and related tests such as urinalysis. If it is merely a case of the skin type, it only necessitates bed rest and observation of the number and extent of bleeding points on the skin and mucous membranes without special treatment. If there are symptoms like black stools or proteinuria, bed rest is imperative along with the use of anti-allergy medications or corticosteroids to enhance treatment, continuing until the proteinuria resolves.

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Written by Yang Ya Meng
Rheumatology
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What should I do if allergic purpura causes vomiting?

Patients with allergic purpura who experience symptoms of vomiting need to be highly vigilant to determine if it is the gastrointestinal type of allergic purpura. In addition to observing the vomiting, we also need to check for symptoms such as abdominal pain and diarrhea in the patient. Regarding treatment, we need to consider the use of corticosteroids. If the patient’s condition allows, immunosuppressants might also be needed. Dietary considerations are also very important; first, it is essential to maintain a light, liquid diet, avoid spicy or tough foods to manage the vomiting symptoms associated with allergic purpura. (The use of medications should be under the guidance of a professional doctor.)

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Written by Yang Ya Meng
Rheumatology
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Does allergic purpura cause vomiting?

Patients with allergic purpura may experience symptoms of vomiting. Patients with the gastrointestinal type of allergic purpura may exhibit symptoms such as vomiting, abdominal pain, and diarrhea. The gastrointestinal type is considered a severe form of allergic purpura because it affects critical internal organs and the intestines. In treatment, besides using anti-allergic methods to reduce rashes, it is also necessary to use corticosteroids to reduce inflammation and control gastrointestinal symptoms. Additionally, immunosuppressants such as mycophenolate mofetil can be used to control the gastrointestinal response. Meanwhile, patients should adhere to a strict fasting regimen until symptoms like vomiting and diarrhea improve. (Medication should be administered under the guidance of a professional doctor.)

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Written by Li Jing
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Allergic purpura belongs to which department?

Allergic purpura is a common vasculitis related to hypersensitivity, essentially a type of vasculitis that belongs to hematological diseases. It is mostly caused by infections or allergies to food and drugs, predominantly occurring in adolescents. It is more common in males, but a minority of adults may also develop allergic purpura. The main types include abdominal, renal, articular, mixed, and cutaneous forms. However, when allergic purpura nephritis occurs, presenting with proteinuria or decreased kidney function, it is necessary to visit a nephrology department. Treatment should aim to control proteinuria, protect kidney function, and reduce damage to kidney functions. Therefore, it is essential to visit a nephrologist at this time. Allergic purpura must be differentiated in treatment; if it is merely a cutaneous or abdominal type, a hematologist can manage it. However, if the kidneys are involved, it requires consultation in a nephrology specialty. (Please use medications under the guidance of a professional physician and do not self-medicate.)