I can understand the confusion that every one of your age goes through, it is good that you at least asked.
It is natural to be the penis and the foreskin growing and the then your feeling that the foreskin is growing over the head of penis.
Just stop worrying.
If you can pull back the foreskin in the morning at bath and clean it properly and replace it back. Never allow to stay behind.
Hope this helps you.
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