Treat pixels like water with a Liquify filter.
The Liquify filter, found in Filter › Liquify, lets you push and pull pixels in Photoshop. Move your cursor through the pixels like they’re water, pushing elements very slightly in one direction or another. Use the filter for subtle retouching tasks, and reach for it to smooth out wrinkles in clothing or rough edges. Also use the Liquify filter to tweak subtle elements like facial features.