Think I have the same thing but struggling to think why it happened. It feels like a small lump on the inside of my skin near the base of my dick. It feels tender but not painful. The lump, or whatever it is, is on the inside of the skin and not attached to my penis.
All I am doing at the minute is compression hanging, attachment point is not near the tender part. I also jelq. I feel it when I jelq as I rub over it. I don’t feel it at all when I hang. I have had sex etc without issues and the tenderness is dying down.