I was brushing my teeth until i cane across this white, circular spider maker on the very backend of my tongue. I’m worried as I’ve never noticed this mark before and that it could be cancer. I do smoke/vape cannabis. I’ll be scheduling to see a dentist pretty soon, but what does this mark mean? If anybody can please tell me I will very much appreciate it. Here are some photos I took. I hope that they are visible enough. Thank you
Possible signs of cannabis use.