Hi there.
I've been having these red spots almost in a circle on my penile head for a few months now.
Some time it's more visible than others, but it never goes 100% away.
I've had the same sex partner for 12 years, so nothing new here.
It doesnt itch or hurt in any way - when touching it, i notice it's like small bumps.
Any ideas about what this can be? 
This looks rather unusual - but perhaps it is just an abnormal reaction, in terms of appearance, to a typical cause.
So, a dermatological reaction to something your penis head is exposed to on a fairly regular basis I am wondering. Think about things, in terms of chemical compounds your penis comes into contact with fairly regularly: -
Condoms, Lubes, Baby Oil, Skin Lotion / Gels, a particular soap, shower gel, even something like additives for washing your clothes with / washing powder - something your sex partner uses from time to time: Lubes / pessaries placed around / in and so on?
The other thing you possibly could have is a type of Balanitis type condition. Really, the only way you are going to know for certain is when your condition is at its worst, go to a drop-in at a Specialist Sexual Health Service, or a GUM Clinic at a General Hospital and get it checked out - someone will have seen this before at such a service ....
Hey man
Have you perhaps been to see a Dermatologist yet or a GP etc? Been using any medicine for it?