If you've forgotten your password and have access to the email associated with your Pinterest account, you can reset your password.

You need to be able to log in to the email account associated with your Pinterest account to reset your password. If you don't have access to your email address, create a new account instead. You can then save Pins from your old account to your new one.

If you're logged in to Pinterest, your account email address will be the first thing listed in your Account settings.