I'm still not sure about your situation. I need more information from you. Let me explain.
There are at least two reasons for not being able to retract the foreskin so it goes behind the corona or "ridge" of the penis head and exposes the penis head completely:
- the foreskin is too tight, making it difficult to slide the skin back. If this is the case, stretching exercises might help.
- the foreskin is stuck to the glans (that is, to the penis head).
In the second case, there are "adhesions". In other words, the foreskin is attached to the head of the penis. This is natural. At birth, the foreskin is stuck to the glans. As a little guy grows up and becomes a teenager, the foreskin and the glans gradually separate, and this separation might not finish until the guy is 17 years of age.
So, if you have adhesions, you can wait a couple of years to see if the foreskin separates from the glans. Or, if you are impatient, you could try separating it yourself by applying some baby oil between your foreskin and the penis head, and very carefully and slowly
pulling your foreskin away from the glans. Do this after you have made the foreskin as soft as possible by taking a warm bath or shower.
If you want to try this yourself, I need to tell you that it might not be easy. One website says about this procedure: "Forcible retraction may lead to bleeding, scarring, pathological phimosis or paraphimosis, and often pain. Adhesions after forcible retraction, especially in infants, can fuse the foreskin with itself or the glans, leading to skin bridges."
This description is in the context of talking about how doctors and parents who know nothing about the foreskin
can do damage by using force to retract a kid's foreskin. I'm not saying that all of that scary stuff will happen to you if you try pulling back your foreskin. In fact, guys who have had "adhesions" have been able to pull back their foreskins with no trouble.
I'm not trying to scare you. I just want to give you as much information as I can. I don't even know if this applies to you because, as I said, I need more information from you. Do some research on the internet about all of this and find a good illustration of the penis, foreskin and frenulum -- both flaccid and erect -- and compare it with your situation. You need to learn as much about your own penis as you can.
Think about what I have said and let me know what you think. The more information we have, the better we are able to help.
You say, "it is also very red". Do you mean your foreskin or the glans? You say that the head of your penis is very sensitive. Yes, it will be for a while. Don't worry about that until you are able to retract your foreskin completely. There are ways of desensitising your penis head.
After you've read all of this, let me tell you that uncircumcised guys often solve their own problems with masturbation. It's a natural way to deal with a tight foreskin and, sometimes, with adhesions.
Don't forget: every problem has a solution.