Did it ever show? What Photoshop Version? Did you try resetting your Photoshop Preferences?
It's PS CC 2017. It's not showing since I installed it. I just tired. not work.
I just found out what's going on!
It's the setting of my wacom.
Go to setting--pen&windows ink, and turn on "show cursor"
Thank you for helping me！
If you have a subscription try installing a prior version. Like CC 2014 the version I use. However I do not have a Wacom mobile studio look like a great device but less mobile then a Surface Pro 4. A 4K 15.6 display ouch that high resolution I would think using 2X UI is a must and it not without problem.
Make sure you have the latest Wacom drivers and the latest Nvida Quagro device driver for the model you have. Also try playing the Photoshop Performance Preferences GPU Advance settings.