Blender sculpting mask tool not working For the past few days I've been learning Blender and today I'm trying out sculpting by just using all the tools and trying to make a simple face.

However I want to extrude out the neck as I did make a low poly face. At first it worked perfectly when I masked the neck area and used the snake hook tool to extrude it out, however my mask was not how I wanted it to be so I removed it and tried masking again.

I might've pressed some wrong keys trying to remove the mask and when I select the mask tool again it shows a grey circle (not sure if its supposed to be grey or not) but doesn't actually draw the black region over my model. When I restart Blender it is still the same. Does anyone have a clue on what I might have done wrong here and how I can return it to default? The strength is not set to 0.

Happy new year and a thank you in advance!
I had the same problem and found in the top left drop down menu "sculpt" there is a check box for show mask. The hotkey is CTRL M