Is allergic purpura nephritis contagious?

Written by Li Liu Sheng

Nephrology

Updated on September 23, 2024

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Kidney damage caused by allergic purpura is called allergic purpuric nephritis. The main mechanism of allergic purpuric nephritis is the deposition of immune complexes in the kidneys, causing hematuria, proteinuria, edema, and hypertension. Severe cases of purpuric nephritis may also lead to renal failure. Additionally, patients with allergic purpuric nephritis exhibit systemic symptoms such as skin purpura, abdominal pain, joint pain, and melena. Allergic purpuric nephritis usually occurs in children, and it is not contagious. Unlike viral hepatitis, tuberculosis, and dysentery, it does not spread through respiratory, digestive, or blood pathways.

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Written by Li Jing

Rheumatology

1min 19sec

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Can allergic purpura be inherited?

Allergic purpura is mostly caused by exposure to infections, medications, or foods, leading to skin and mucous membrane ecchymoses, which are essentially petechiae and a manifestation of vasculitis. It falls under autoimmune diseases, not genetic diseases, and thus is not contagious. Bacterial, viral, mycoplasmal, or parasitic infections are the most common causes. Secondarily, medications and foods can also trigger allergic purpura, such as high-protein foods like seafood and milk. Therefore, if there are symptoms like ecchymoses on the lower extremities accompanied by joint pain, or signs of blood in the stool or black stool, it is necessary to complete routine blood tests, erythrocyte sedimentation rate, and autoimmune antibody tests to rule out other autoimmune diseases. During the acute phase, it is advisable to rest in bed, eat a light diet, avoid infection, and use corticosteroids for anti-allergy treatment if necessary.

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Written by Yang Ya Meng

Rheumatology

34sec

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How many days will allergic purpura take to fade?

The symptoms of the rash from allergic purpura generally subside naturally after about 7 to 10 days. However, if care is not taken in daily life, there is a high likelihood of recurrence of the rash. Patients with allergic purpura should avoid vigorous activities such as fast running and should also avoid getting chilled and infections, as both cold and infections could exacerbate the condition. Additionally, patients should consume less of foods like shrimp and crab, which may trigger allergic reactions.

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Written by Yang Ya Meng

Rheumatology

1min 3sec

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Does allergic purpura cause itchy skin?

The skin of patients with allergic purpura generally does not show symptoms of itching, although it is called allergic purpura. However, the main clinical manifestations are inflammation of the capillaries at the extremities of the lower limbs, accompanied by a characteristic rash, without noticeable symptoms of skin itching. If a patient with allergic purpura also has symptoms of skin itching, it may be necessary to consider whether there is a concurrent allergic dermatitis or similar condition. Besides the typical purpuric rash on both lower limbs, some patients with allergic purpura may also experience nausea, vomiting, diarrhea, and these symptoms are referred to as the gastrointestinal type of allergic purpura. Some patients may experience joint pain, which belongs to the joint type of allergic purpura, and others may present with proteinuria, which belongs to the renal type of allergic purpura.

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Written by Li Liu Sheng

Nephrology

52sec

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Is allergic purpura nephritis contagious?

Kidney damage caused by allergic purpura is called allergic purpuric nephritis. The main mechanism of allergic purpuric nephritis is the deposition of immune complexes in the kidneys, causing hematuria, proteinuria, edema, and hypertension. Severe cases of purpuric nephritis may also lead to renal failure. Additionally, patients with allergic purpuric nephritis exhibit systemic symptoms such as skin purpura, abdominal pain, joint pain, and melena. Allergic purpuric nephritis usually occurs in children, and it is not contagious. Unlike viral hepatitis, tuberculosis, and dysentery, it does not spread through respiratory, digestive, or blood pathways.

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Written by Liu Li Ning

Rheumatology

48sec

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Is allergic purpura contagious?

Allergic purpura is not a contagious disease; it is an autoimmune disorder, and therefore it is not transmissible. This condition is a self-limiting disease commonly found in adolescents and children. It mainly comes in four types: simple, renal, abdominal, and articular. Common symptoms include purpura on the limbs and body, and it may also involve abdominal pain, joint pain, and hematuria among other organ impairments. During the acute phase, bed rest is required. Sometimes, when the kidneys are affected, corticosteroids are necessary for timely treatment. If there is joint swelling and pain, nonsteroidal anti-inflammatory drugs can be used to alleviate pain, and antispasmodic analgesics can be used for abdominal pain.