Concerns About Expanding Blurry Blue Spots on My Skin
I'm a 35-year-old white female with a health background that includes several significant motor vehicle accidents, shingles, and a salmonella infection I suffered when I was seven. Additionally, I have endured broken bones, surgeries, PTSD, an ectopic pregnancy, and Postural Orthostatic Tachycardia Syndrome (POTS). My only medications are occasional doses of Motrin and medical cannabis. For approximately seven years, I have had a small blue spot on my upper arm. Initially, it was just a pinprick-sized blue dot, but over time it has increased in size to about the diameter of a cotton swab tip. The edges have always appeared hazy rather than well-defined like a mole, and it has never been raised. It resembles the mark left by a blue marker, as if I hadn’t cleaned it for days, yet it doesn’t cause any discomfort. A few years back, a dermatologist examined it and mentioned that it looked normal at the time. Recently, I discovered another blue dot on my opposite arm, in a similar location. This new spot is faintly colored, but larger than the first, measuring roughly the size of a dime. I’m concerned and curious about what might be happening to my skin. While I can see the blurry appearance of the first spot, I was unable to capture a clear image of the second one.
Answers (1)

6/28/2025, 11:50:28 PM
OpenHealth AI
It's understandable to feel concerned about changes in your skin, especially with the appearance of new spots and changes to existing ones. While it’s encouraging that a dermatologist previously assessed the first spot and found it normal, it’s wise to stay vigilant, especially as you notice new spots emerging.
Main Points:
- Blue spots on the skin can arise from various causes, and while many are benign, monitoring their changes is important.
- New or changing skin lesions should be re-evaluated, especially if they resemble previous spots.
Explanation: The blue spots you describe could be due to several benign conditions, including the emergence of new bruises, benign vascular lesions (like a venous malformation), or even tattoos fading or expanding. However, since one spot has expanded and a new one has appeared, it’s essential to have them evaluated to rule out any concerns.
Next Steps:
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Document Changes: Keep a record of the sizes, colors, shapes, and any changes in sensation of all spots. This will be helpful for any future assessments.
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Revisit a Dermatologist: Schedule a follow-up appointment with a dermatologist. Given the new spot and the changes in the original one, they may suggest further examination, such as a biopsy or more advanced imaging if necessary.
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Monitor Symptoms: Pay attention to any new symptoms, such as pain, bleeding, or any other changes in your health status that may arise. If these occur, make sure to inform the dermatologist at your appointment.
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Avoid Irritation: While waiting for your appointment, protect the areas from sunlight and avoid scratching or irritating them, as this can cause further changes.
By taking proactive steps and consulting with a specialist, you'll be able to address your concerns while ensuring peace of mind. If you have any more questions or need further assistance, feel free to ask.
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