Beginner to Blender and require help please (Candy Wrapper Deformation)

Hello, I’m new to blender and have been try to make a model but I’ve been having problems with the elbow and forearm and other places deforming when twisting bones,

The first Picture depicts the arm with the palm facing towards the ground, so far everything looks ok

The problem comes when i try to twist the arm so that the palm faces towards the sky

In the human body the wrists is able to rotate thanks to the forearm so i also want my model to work like than but when i rotate the forearm so that the palm faces upward the elbow shrinks and resembles a sort of candy wrapper.

Why does this happen and does anyone know how to fix it.

Could any one tell me how to fix it please, And if you don’t know do you know what i could search to hopefully find the answers. I’ve tried searching for answers myself but anything i type comes up with nothing useful.


(Palm Facing Downward)

(Palm Facing Upward)

(Downward Clearer View)

(Upward Clearer View)
Screenshot 2024-08-27 143911
(Mesh)

(Mesh Zoomed Out)

(Arm Weight Paint)

(Forearm Weigh Paint)

I had the same issue, and managed to fix it using the help of this video:

this is a bit of advanced rigging, but eventually I got my arm twisting like this:

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thank you for your help. And your model looks gorgeous by the way.

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