HELP! Scale rot? Scab? Stuck shed?

[JacobH]

I'm new to owning snakes and I just recently bought my first (corn snake) he's a normal diffused corn snake 4 ft long and I bought him from a local breeder. I asked him most the general questions when buying a new snake but I noticed on the tip of his nose it's a smoky black color I didn't take to much mind to it until I examined him very closely. he has shed once and it has not gone away also he seems to have stuck shed or something covering 1 of the holes on his nose. The black is concerning me because it doesn't look all to normal, but other then the weird look he's been acting like a regular corn snake should very active tounge is flickering he's drinking and hasn't refused a meal
Side notes
Gets fed large mice every week
Lives in 55 gallon
Aspan bedding
Water dish changed every day and washed
Low temp side about 75-79
Basking spot 80-86
Humidity ranges from 30-40
PLEASE HELP IM WORRIED ABOUT MY LITTLE HAYWIRE!

[SSSSnakes]

Without pictures it is hard to say. Maybe nose rub from trying to escape.