Allergic Vasculitis: When to Seek Further Medical Attention - Internal Medicine

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Allergic vasculitis


Hello, Doctor.
About last weekend (12/10), I started to notice a rash on my legs (with no other obvious discomfort, just slight nasal discharge like nasal allergies).
After two or three days, the rash increased significantly, so I visited a dermatologist.
The dermatologist diagnosed me with allergic vasculitis and prescribed a one-day course of oral steroids and a topical ointment (Cortisol ointment).
After taking the oral medication, the rash did not increase significantly, and after applying the topical medication for three days, I feel that the rash has improved, changing to a dark red or light brown color.
I would like to ask the doctor if the rash gradually disappears, would you recommend further examination at the hospital?

Li, 20~29 year old female. Ask Date: 2023/12/17

Dr. Gao Jiankai reply Internal Medicine


Hello, thank you for your inquiry.
If the rash improves, I believe there is no need to visit a large hospital for further examination.
The Allergy, Immunology, and Rheumatology Department of Changhua Hospital, Ministry of Health and Welfare, is concerned about you.

Reply Date: 2023/12/17

More Info


Allergic vasculitis is a condition characterized by inflammation of the blood vessels, often triggered by an allergic reaction or an underlying condition. It can manifest as a rash, typically presenting with red or purplish spots on the skin, and may be accompanied by other symptoms depending on the severity and underlying cause. In your case, it seems that the initial symptoms have improved with the treatment prescribed by your dermatologist, which is a positive sign.

When considering whether to seek further medical attention, there are several factors to keep in mind:
1. Symptom Improvement: Since you mentioned that the rash has started to improve and is changing color, this is generally a good indication that the treatment is effective. If the rash continues to fade and you do not develop any new symptoms, it may not be necessary to seek further medical attention immediately.

2. Monitoring Symptoms: It is essential to monitor your symptoms closely. If you notice any new symptoms such as increased swelling, pain, fever, or if the rash begins to spread again, it would be prudent to consult your healthcare provider. These could be signs of a more severe reaction or an underlying issue that needs to be addressed.

3. Duration of Symptoms: If the rash persists for an extended period or if you experience recurrent episodes, further evaluation may be warranted. Chronic or recurrent symptoms could indicate that there is an ongoing allergic reaction or another underlying condition that needs to be identified and treated.

4. Underlying Conditions: Allergic vasculitis can sometimes be associated with other systemic conditions, such as autoimmune diseases. If you have a history of such conditions or if you develop systemic symptoms (like joint pain, fatigue, or fever), it would be advisable to seek further evaluation.

5. Follow-Up with Your Dermatologist: Since you have already been diagnosed and treated by a dermatologist, it would be beneficial to follow up with them as advised. They can provide guidance based on your progress and determine if any additional tests or treatments are necessary.

6. Medication Side Effects: Be aware of any side effects from the medications you are taking, such as the oral steroids. If you experience any unusual symptoms or side effects, you should contact your healthcare provider.

In summary, if your symptoms are improving and you are not experiencing any new or concerning symptoms, it may not be necessary to seek further medical attention at this time. However, continue to monitor your condition closely, and do not hesitate to reach out to your healthcare provider if you have any concerns or if your symptoms change. Regular follow-up with your dermatologist is also important to ensure that your condition is managed effectively.

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