How to do Professional Skin Retouching without using Plugins in Ps

How to do Professional Skin Retouching without using Plugins in Ps,

The most effective method for professional-level skin retouching in Adobe Photoshop without third-party plugins (e.g., Portraiture or Retouch4me) is the Frequency Separation technique. Major editors use it because it allows you to adjust only the color and tone without destroying the texture of the skin.