Cannot use sculpting tools on specific part of a mesh I have been sculpting a mesh into a high-poly human form for a few days. I got to the head and my sculpting tools are barely able interact with it. I can only seem to interact with it on a macro scale and sometimes there are little spikes that the smooth tool cannot smooth. I can still interact like expected with any other part of the mesh but, not the head. 

I've tried deleting all the vertices of the head and then filling the hole but, it creates a plane that I cannot interact with. 

I tried using the boolean modifier to cut off the head and then start sculpting again but, I got the same result.

I tried recalculating all the normals on the head and it didn't work.

Also I have mirrored sculpting on and the head at times appears asymmetrical
Okay, so I enabled Dynotopo and now it works.