Skin Spots: What Do Small Round Marks Mean?

Moles or spots

Hello doctor, I have developed two small round spots under my chest that are about two centimeters apart.
They are not painful or itchy, and their color is only slightly darker than my skin tone (they resemble the scars from childhood vaccinations on my arm, but they are flat and not very noticeable to the touch).
I noticed the first one about six months ago, and I recently discovered the second one, which is about the size of a button or even smaller.
Could you please tell me what kind of lesion this might be? Thank you.

Mi, 20~29 year old female. Ask Date: 2016/03/01

Dr. Wu Yuxin reply Dermatology

Without actually seeing the lesion, it cannot be confirmed.
If it is very concerning, it is recommended to seek medical attention as soon as possible.

Reply Date: 2016/03/01

More Info

Hello! Thank you for your question regarding the small round marks you have noticed on your skin. Based on your description, it sounds like you are observing two small, round spots located under your chest, which are slightly darker than your natural skin tone and have been present for about six months. They are not painful or itchy, and they resemble flat scars from past vaccinations.

While I cannot provide a definitive diagnosis without a physical examination, I can offer some insights into what these spots might be and what you should consider.

1. Possible Causes:
- Seborrheic Keratosis: These are benign growths that often appear as small, round, and slightly raised spots on the skin. They can vary in color from light tan to dark brown and are common in older adults.

- Lentigines (Age Spots): These are flat, brown spots that develop on sun-exposed areas of the skin due to UV exposure. They are usually harmless and more common in individuals with fair skin.

- Dermatofibromas: These are firm, raised nodules that can appear on the skin and are usually harmless. They can be skin-colored or slightly darker.

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

- Moles (Nevi): These can be flat or raised and vary in color. If they change in size, shape, or color, they should be evaluated by a dermatologist.

2. When to Seek Medical Advice:
- If the spots change in size, shape, or color.

- If you notice any new symptoms, such as itching, bleeding, or pain.

- If you have concerns about the appearance of the spots or if they cause you anxiety.

3. Self-Examination: It’s important to regularly check your skin for any changes. Look for new spots or changes in existing moles. The ABCDE rule can help you assess moles:
- Asymmetry: One half is unlike the other half.

- Border: Irregular, scalloped, or poorly defined edges.

- Color: Varied from one area to another; shades of tan, brown, or black.

- Diameter: Larger than 6mm (about the size of a pencil eraser).

- Evolving: A mole that changes in size, shape, or color.

4. Consulting a Dermatologist: Given that you have noticed these spots over time, it would be wise to consult a dermatologist. They can perform a thorough examination and may recommend a biopsy if there is any concern about the nature of the spots. Dermatologists can provide a definitive diagnosis and appropriate treatment options if necessary.

In conclusion, while the small round marks you described may not be a cause for immediate concern, monitoring their appearance and consulting with a healthcare professional is always a prudent approach. Skin health is important, and early intervention can help address any potential issues effectively. Thank you for reaching out, and I hope this information helps you understand your skin better!

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