Red Spots on Skin: Causes and Concerns - Dermatology

More Info

---

When it comes to sudden onset of red spots on the skin, especially when accompanied by high fever, it is essential to consider a variety of potential causes. The symptoms you describe, including the rapid appearance of red spots and a high fever of 40 degrees Celsius (104 degrees Fahrenheit), warrant thorough medical evaluation.
The diagnosis of "erythema multiforme" (多形性紅斑) suggests that your healthcare provider is considering a hypersensitivity reaction, which can be triggered by infections, medications, or other factors. Erythema multiforme is characterized by target-like lesions and can be associated with viral infections, particularly herpes simplex virus, but it can also arise from other causes, including drug reactions.

In your case, the concern about sexually transmitted infections (STIs) is valid, especially if there are any risk factors or recent exposures. While erythema multiforme itself is not an STI, certain infections that can lead to similar skin manifestations may be sexually transmitted. For instance, infections like syphilis or herpes can present with skin lesions, and they may also cause systemic symptoms such as fever.
The fact that your genital area does not have any visible lesions is reassuring, but it does not completely rule out the possibility of an STI. Blood tests are crucial in this scenario, as they can help identify specific infections, including STIs, and rule out other conditions.
In addition to infections, other potential causes of sudden red spots and fever include:
1. Allergic Reactions: Allergies to medications, foods, or environmental factors can lead to hives or rashes, often accompanied by systemic symptoms like fever.

2. Viral Exanthems: Many viral infections, such as measles, rubella, or roseola, can cause rashes and fever. These conditions often have distinct patterns and associated symptoms.

3. Autoimmune Conditions: Conditions like lupus or vasculitis can cause skin rashes and systemic symptoms, including fever.

4. Drug Reactions: If you have recently started any new medications, a drug reaction could be a possibility. This can manifest as a rash and fever.

5. Infectious Diseases: Beyond STIs, other infectious diseases like bacterial infections, meningitis, or even systemic viral infections can present with fever and skin changes.

Given the complexity of your symptoms, it is crucial to follow up with your healthcare provider for further evaluation. They may recommend additional blood tests, imaging studies, or even a skin biopsy if necessary. It is also important to monitor your symptoms closely and seek immediate medical attention if you experience worsening symptoms, such as difficulty breathing, swelling, or severe pain.

In conclusion, while erythema multiforme is a potential diagnosis, the underlying cause of your symptoms needs to be thoroughly investigated. It is essential to keep an open line of communication with your healthcare provider and ensure that all your concerns, including the possibility of STIs, are addressed. Early diagnosis and appropriate treatment are key to managing your condition effectively.