How does pregnancy affect your skin?

In several ways. Your skin goes through several changes during pregnancy. Some areas become darker due to changes in the pigment of your skin. Luckily, this generally fades. Blood vessels can become for prominent, moles can change in appearance & stretch marks develop due to connective tissue changes. Itching may be normal or a sign of something more concerning. Always discuss any skin changes with your dr.
In different ways. In the early part of pregnancy you may have acne. As your pregnancy progresses your skin becomes more beautiful which is known as the glow of pregnancy.