Unexplained Brown Spots and Patches on Your Skin

Unidentified brown patches and spots have appeared on the body?

I have a brown, irregularly shaped patch about 2 centimeters in size located below my chest.
It feels flat and has been present for quite some time without disappearing.
Additionally, I have four brown spots on the soles of my feet that resemble moles, which also feel flat.
What could be the reason for these patches and spots on my body?

Meng, 20~29 year old female. Ask Date: 2019/09/06

Dr. Wu Yuxin reply Dermatology

You need to take a look! Without seeing the lesion, it's impossible to determine what the issue is.
If it's very concerning, please seek medical attention as soon as possible.

Reply Date: 2019/09/06

More Info

Understanding unexplained brown spots and patches on the skin can be concerning, especially when they appear irregularly and persist over time. Based on your description of a 2-centimeter irregularly shaped brown patch on your chest and four flat brown spots on your soles, there are several potential causes to consider.

Possible Causes
1. Lentigines: Commonly known as age spots or liver spots, these are flat, brown, or black spots that develop on sun-exposed areas of the skin. They are typically harmless and result from prolonged sun exposure over the years.

2. Seborrheic Keratosis: These are non-cancerous growths that can appear as brown, black, or light tan spots. They often have a waxy, scaly, or slightly elevated appearance and are more common as people age.

3. Melanocytic Nevi (Moles): Moles can vary in color and size and may be flat or raised. They are usually benign but should be monitored for any changes in size, shape, or color, which could indicate a need for further evaluation.

4. Post-Inflammatory Hyperpigmentation: If you have had any previous skin irritation, injury, or inflammation in the area, it could lead to darkened patches as the skin heals.

5. Eczema or Dermatitis: Chronic skin conditions can sometimes lead to discoloration or patches on the skin, especially if there has been scratching or irritation.

Recommendations for Management
1. Consult a Dermatologist: The most important step is to consult a dermatologist who can perform a thorough examination of your skin. They may recommend a biopsy if there is any suspicion of malignancy or if the spots change over time.

2. Sun Protection: Regardless of the cause, protecting your skin from further sun exposure is crucial. Use broad-spectrum sunscreen with an SPF of at least 30, wear protective clothing, and avoid tanning beds.

3. Moisturizing: Keeping your skin well-moisturized can help improve its overall appearance and health. Look for products that contain ingredients like hyaluronic acid or glycerin.

4. Topical Treatments: Depending on the diagnosis, your dermatologist may recommend topical treatments. For example, hydroquinone or retinoids can help lighten hyperpigmented areas, while other treatments may be suggested for seborrheic keratosis or lentigines.

5. Regular Monitoring: Keep an eye on the spots for any changes in size, shape, or color. If you notice any changes, return to your dermatologist for further evaluation.

Conclusion
While brown spots and patches on the skin can often be benign, it is essential to have them evaluated by a healthcare professional to rule out any serious conditions. Early detection and treatment can make a significant difference in managing skin health. Remember, your skin is a reflection of your overall health, and taking proactive steps can help maintain its appearance and function.

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