Obviously, being made from a basic cube in sculpt mode, it’s not worth me showing you the topology of this head. I don’t think I’m going to go much further with this mesh anyway. I’m going to make a more efficient base mesh and start again. Comments and crits more than welcome. 
If you going to start again, use retopo. Create a nice mesh with it, and then sculpt the details. It’s good technique how to get clean mesh. Anyway, the years look strange.