How many days will allergic purpura take to fade?

Written by Yang Ya Meng

Rheumatology

Updated on November 29, 2024

00:00

00:00

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.

Other Voices

home-news-image

Written by Yang Ya Meng

Rheumatology

54sec

home-news-image

Mild symptoms of allergic purpura

Allergic purpura mainly includes three pathological types. The symptoms of the mild type mainly involve changes in the skin, primarily purpura-like rashes around the lower legs and ankle joints. If there are only skin lesions, it is considered a very mild case of allergic purpura. Additionally, more severe cases may involve kidney impairment, such as the presence of protein in the urine. Some patients primarily experience joint pain, also known as the arthritic type. Another group of patients presents mainly with sudden abdominal pain, primarily known as the abdominal type. Therefore, mild symptoms of allergic purpura might just be typical rashes. As long as there is no involvement of the visceral system, it is considered relatively mild.

home-news-image

Written by Li Jing

Rheumatology

1min 5sec

home-news-image

Is allergic purpura serious?

Firstly, allergic purpura is caused by infections, drugs, or food allergies leading to skin ecchymosis and petechiae; in addition, it can also manifest as joint pain, hematuria, and melena. The presence of protein in a routine urine test along with hematuria or melena often indicates gastrointestinal allergic purpura and renal allergic purpura. The presence of proteinuria suggests kidney involvement, which is the most severe type among various forms of allergic purpura. If it is solely a cutaneous type, no special treatment is needed other than drinking more water and ensuring bed rest to alleviate skin ecchymosis. If proteinuria or hematuria occurs, one must rest in bed until the protein levels improve before resuming activities. Concurrently, corticosteroids and anti-allergy medications should be administered. (Medication should be used under the guidance of a professional doctor.)

home-news-image

Written by Li Jing

Rheumatology

1min 2sec

home-news-image

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.

home-news-image

Written by Yang Ya Meng

Rheumatology

50sec

home-news-image

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.)

home-news-image

Written by Li Jing

Rheumatology

1min 19sec

home-news-image

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.