I have a purple spot about 1/2 inch in diameter with a touch of red in the middle right on top of a small vein

Symptoms are of Fordyce spots: small (1-5mm) bright red or purple papules that can appear on the glans, shaft or scrotum and usually affect younger men. They may occur as a solitary lesion, but frequently appear in crops of 50 to 100. They are painless and not itchy, but may cause embarrassment because of their appearance, or a fear that they might be sexually transmitted. They are abnormally dilated blood vessels, covered by thickened skin. They may bleed if injured or even during intercourse. They are not infectious and their cause is unknown. Although a number of approaches have been tried, there is no simple, reliable treatment to remove them.

Best to see a doctor for a correct diagnosis.

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