Well, without a detailed description or a detailed clinical evaluation it would be difficult to comment specifically on the situation. Possibilities that may need to be considered include melanoma, haemangioma, a few primary skin conditions etc. I would suggest getting this evaluated by a primary care physician or a dermatologist for an accurate diagnosis and appropriate management, if required.
Hope this is helpful.
Went to skin doctor n said not to worry
But i worry every time i seee