Adobe Photoshop is the best tool that can be used to retouch digital photos. Even after taking photographs after so many shots, you may still find the need for more improvements in your pictures. In such cases Photoshop comes handy and it can be used to make changes in your images.
You can make improvements like age progression, skin tone effect, change hair color etc. If you are familiar with Photoshop you can make these improvements very easily.