What am I Poem

No skin,
Some get put in the bin,
But not this one,
I had a son

Now it’s Halloween,
I,m sure you have seen,
Hanging at the door of someone’s home,
Scary and alone

But that’s not me,
I just want to be free,
To have back my flesh,
And not be such a mess

I lay in the ground cold,
While others are getting old,
Soon they will be like me,
And then you will see…….

What am I?