You can add or change a profile picture only from the Instagram app on your mobile devices. You can not add or change a profile picture when viewing Instagram on the web. If you want to change your profile picture, go to your profile and tap your profile picture. You will see the blank circle next to your name if you don't have a profile picture. Select the photo to your profile picture. You can select the photo from your phone's photo gallery, Facebook or Twitter. If you select the photo from Facebook or Twitter, then Instagram will use your profile picture for that social network.