Tanning can cause your skin to develop wrinkles especially if you tan in a tanning bed and not out in the natural sunlight.
Tanning beds use non natural UV rays that dehydrate your skin and dry your skin out so when your skin becomes dry your skin can become wrinkled.
My sister got wrinkles when tanning in a tanning bed 6 times and so she decided to stop tanning in the tanning bed but still tans out in the natural sunlight.
When she tans in the natural sunlight she uses moisturizing suntan lotion and she has not gotten any more wrinkles of her skin.
You can still get wrinkles tanning in the natural sunlight as it too dries out your skin but not as bad as a tanning bed.
Using a tanning bed even once could possibly give you cancer.
However it would be a rare chance that you would get cancer just from using a tanning bed only once.
Usually it takes several tanning sessions in a tanning bed over a few years or longer to develop cancer from the tanning bed.
Many people use tanning beds for years and never develop cancer such as skin cancer but some people develop cancer after a few tanning sessions in a tanning bed.
Tanning in a tanning bed is never really a healthy thing to do because the UV rays from the tanning bed are more dangerous to your skin than tanning in the natural sun.
Tanning in the natural sun gives you Vitamins which can be healthy and it's less harmful to tan naturally using the sunlight than to tan in a tanning bed.