Ring stains my finger.
No one has really every reported having issue with this ring, however it could be dirt or sweat that develops under the ring that could be causing that. It's 10k real gold, but that doesn't mean dirt or sweat or some type of allergic reactions to the other alloys can cause that.
10k Solid Gold Yellow Classic Nugget Heart Ring (LG)
The Nugget hear thing is one of my favorites. It has the gold swag with a feminine touch. Love it. I always receive compliments on it.