My foreskin is too big and wrinkly.?

Yea, this seems pretty odd to happen unless it is some sort of allergic reaction. The skin will most likely get back to normal eventually. It might help to apply lotion to moisturize the area. In the mean time, I would only rinse with water, and certainly not shampoo. Not just because of the possible reaction, but also because they dry out the skin. Everyone has some sort of wrinkles.