Red Spots on Feet: Possible Causes and Treatments - Dermatology

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Erythema on the foot?


The photo in the link shows a red spot on my foot that has been present for over a year.
It is not itchy or painful, but it is slowly spreading with small red dots.
I have seen two dermatologists.
One suggested that it might be due to prolonged standing and friction from my shoes, leading to microvascular dilation, and advised waiting for it to resolve on its own.
The other doctor suspected it could be psoriasis and prescribed medication without topical ointments, stating that it would take a long time to fully heal.
Why do the two doctors have different opinions? I would like to ask Dr.
Wu what this red spot might be.
Thank you.

Riyue, 30~39 year old female. Ask Date: 2014/05/18

Dr. Wu Yuxin reply Dermatology


Your photo is unclear and cannot be assessed.
If, as you mentioned, it has been present for a year, a biopsy should be considered.
It is advisable to seek medical attention at a hospital as soon as possible.

Reply Date: 2014/05/18

More Info


Understanding red spots on the feet can be quite complex, especially when different dermatologists provide varying diagnoses. Based on your description of the red spots persisting for over a year, being non-itchy and non-painful, and gradually spreading, there are several potential causes to consider.

1. Microvascular Changes: The first dermatologist suggested that the red spots could be due to microvascular dilation caused by prolonged standing and friction from footwear. This condition, often referred to as "telangiectasia," involves the expansion of small blood vessels near the surface of the skin, leading to red or purple spots. This is generally benign and may resolve on its own over time, especially if the underlying cause (like prolonged standing or ill-fitting shoes) is addressed.

2. Psoriasis: The second dermatologist's suggestion of psoriasis, particularly if they mentioned "psoriatic lesions," is also a possibility. Psoriasis is a chronic autoimmune condition characterized by the rapid growth of skin cells, leading to scaling and inflammation. While it can appear as red spots or plaques, it typically involves some degree of scaling and may be itchy or painful. If psoriasis is indeed the diagnosis, treatment can vary widely, from topical treatments to systemic medications, depending on the severity.

3. Other Considerations: There are other skin conditions that could present as red spots, such as:
- Eczema: This can cause red, inflamed patches on the skin, often associated with itching.

- Petechiae: Small red or purple spots that can occur due to bleeding under the skin, often requiring further investigation to rule out underlying health issues.

- Dermatitis: Contact dermatitis from irritants or allergens can also cause red spots.

Given the conflicting opinions from the two dermatologists, it may be beneficial to seek a third opinion, preferably from a dermatologist who specializes in vascular or inflammatory skin diseases. They may recommend a skin biopsy or other diagnostic tests to clarify the nature of the lesions.


Treatment Options
- Observation: If the spots are not causing discomfort and are not rapidly changing, a watchful waiting approach may be appropriate.

- Topical Treatments: If psoriasis or another inflammatory condition is diagnosed, topical corticosteroids or other anti-inflammatory creams may be prescribed.

- Lifestyle Modifications: If microvascular changes are suspected, wearing well-fitting shoes, taking breaks to sit down, and elevating the feet may help reduce the appearance of the spots.

- Systemic Treatments: For conditions like psoriasis, more aggressive treatments may be necessary, including phototherapy or systemic medications.


Conclusion
In summary, the red spots on your feet could be due to a variety of causes, ranging from benign microvascular changes to more complex dermatological conditions like psoriasis. Given the duration and nature of the spots, further evaluation by a specialist may be warranted. It’s essential to communicate openly with your healthcare provider about your symptoms and any changes you observe, as this will aid in reaching an accurate diagnosis and appropriate treatment plan.

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