In this short tutorial we will go through how to sculpt skin details without using any external alphas or scans in ZBrush. I know this way might be time consuming but it teaches you a lot about the human skin, for those who are on a tight budget and like doing every all by hand. If you prefer using alphas I would recommend Texturing.xyz.
Now before we learn How To Sculpt Skin(Integumentary System) In ZBrush we need to get good reference. Gathering reference can be sometimes very hard and tedious, it is important to gather as much reference as possible.
Now to save you from all that trouble from using 2d reference which is very hard to understand forms, we have made available our HD Male Integumentary System 3D model for purchase on our store. Great anatomy reference, with a base mesh, different file formats and subdivisions.