Thank you for asking. It appears to be a problem of Phemosis. A condition in which the opening at the foreskin is constricted. There difficulty in retracting the foreskin back and forth. Depending upon the degree of constriction at foreskin opening, the management can be decided. It is primarily a surgical problem.
Next Steps
I must visit a general surgeon. For more information you can ask a detailed query here on practo.
Health Tips
Do not worry. It is very common. It is completely treatable.