Edit the photo

If you have photo editing software, you can also touch up any blemishes or flaws on the selfie before uploading it to a social media account. You can cut out parts of the background, resize the photo so it frames your face differently, change the way the light looks, and so on. Many of these edits can be made on your phone without using an app, but you might want to look into the dozens of apps available for this purpose.
That said, you should use photo editing sparingly. If you cannot make your edits look completely natural, err on the side of caution and delete the changes rather than posting an obvious fake.